# This is the a260999.txt text file.
# Sets that yield a(n) for n = 2..295
# a(1)-a(84) from H. Haanpaa, A. Huima and P. R. J. Ostergard (see link on page oeis.org/a260999), Nov 08 2000
# a(85)-a(200) from Fausto A. C. Cariboni, Dec 11 2017
# a(201)-a(280) from Fausto A. C. Cariboni, Jan 07 2018
# a(281)-a(295) from Fausto A. C. Cariboni, Jan 27 2018

a(2)=1 from {0}
a(3)=2 from {0,1}
a(4)=2 from {0,1}
a(5)=2 from {0,1}
a(6)=2 from {0,1}
a(7)=3 from {0,1,3}
a(8)=3 from {0,1,3}
a(9)=3 from {0,1,3}
a(10)=3 from {0,1,3}
a(11)=3 from {0,1,3}
a(12)=3 from {0,1,3}
a(13)=4 from {0,1,3,9}
a(14)=4 from {0,1,4,6}
a(15)=4 from {0,1,3,7}
a(16)=4 from {0,1,3,7}
a(17)=4 from {0,1,3,7}
a(18)=4 from {0,1,3,7}
a(19)=4 from {0,1,3,7}
a(20)=4 from {0,1,3,7}
a(21)=5 from {0,1,4,14,16}
a(22)=4 from {0,1,3,7}
a(23)=5 from {0,1,3,8,14}
a(24)=5 from {0,1,3,9,20}
a(25)=5 from {0,1,3,7,12}
a(26)=5 from {0,1,3,7,12}
a(27)=5 from {0,1,3,7,12}
a(28)=5 from {0,1,3,7,12}
a(29)=5 from {0,1,3,7,12}
a(30)=5 from {0,1,3,7,12}
a(31)=6 from {0,1,3,8,12,18}
a(32)=5 from {0,1,3,7,12}
a(33)=5 from {0,1,3,7,12}
a(34)=5 from {0,1,3,7,12}
a(35)=6 from {0,1,3,7,12,20}
a(36)=6 from {0,1,3,8,23,27}
a(37)=6 from {0,1,3,7,16,26}
a(38)=6 from {0,1,3,7,17,30}
a(39)=6 from {0,1,3,7,12,22}
a(40)=6 from {0,1,3,7,17,28}
a(41)=6 from {0,1,3,7,12,20}
a(42)=6 from {0,1,3,7,12,20}
a(43)=6 from {0,1,3,7,12,20}
a(44)=6 from {0,1,3,7,12,20}
a(45)=6 from {0,1,3,7,12,20}
a(46)=6 from {0,1,3,7,12,20}
a(47)=6 from {0,1,3,7,12,20}
a(48)=7 from {0,1,3,15,20,38,42}
a(49)=7 from {0,1,3,7,27,35,40}
a(50)=7 from {0,1,3,8,14,18,30}
a(51)=7 from {0,1,3,7,12,20,30}
a(52)=7 from {0,1,3,7,12,22,35}
a(53)=7 from {0,1,3,7,12,22,40}
a(54)=7 from {0,1,3,7,16,26,37}
a(55)=7 from {0,1,3,7,12,20,30}
a(56)=7 from {0,1,3,7,12,20,41}
a(57)=8 from {0,1,3,13,32,36,43,52}
a(58)=7 from {0,1,3,7,12,20,43}
a(59)=7 from {0,1,3,7,12,20,34}
a(60)=7 from {0,1,3,7,12,20,38}
a(61)=7 from {0,1,3,7,12,20,30}
a(62)=7 from {0,1,3,7,12,20,30}
a(63)=8 from {0,1,3,7,15,20,31,41}
a(64)=8 from {0,1,3,8,19,25,29,52}
a(65)=8 from {0,1,3,11,15,20,36,42}
a(66)=8 from {0,1,3,7,12,20,41,51}
a(67)=8 from {0,1,3,7,12,20,30,46}
a(68)=8 from {0,1,3,7,12,20,43,53}
a(69)=8 from {0,1,3,7,12,22,30,56}
a(70)=8 from {0,1,3,7,12,22,45,53}
a(71)=8 from {0,1,3,7,12,22,30,46}
a(72)=8 from {0,1,3,7,12,20,34,49}
a(73)=9 from {0,1,3,7,15,31,36,54,63}
a(74)=8 from {0,1,3,7,12,20,45,59}
a(75)=8 from {0,1,3,7,12,20,34,50}
a(76)=8 from {0,1,3,7,12,20,30,51}
a(77)=8 from {0,1,3,7,12,20,30,44}
a(78)=8 from {0,1,3,7,12,20,47,57}
a(79)=8 from {0,1,3,7,12,20,30,44}
a(80)=9 from {0,1,3,9,22,27,34,38,66}
a(81)=8 from {0,1,3,7,12,20,30,45}
a(82)=8 from {0,1,3,7,12,20,34,59}
a(83)=8 from {0,1,3,7,12,20,30,44}
a(84)=8 from {0,1,3,7,12,20,30,51}
a(85)=9 from {0,1,3,8,14,29,33,49,76}
a(86)=9 from {0,1,3,8,17,36,42,63,74}
a(87)=9 from {0,1,3,7,17,36,49,67,79}
a(88)=9 from {0,1,3,7,27,41,52,60,73}
a(89)=9 from {0,1,3,7,12,20,35,49,65}
a(90)=9 from {0,1,3,7,20,28,51,61,75}
a(91)=10 from {0,1,3,9,27,49,56,61,77,81}
a(92)=9 from {0,1,3,7,12,20,43,67,77}
a(93)=9 from {0,1,3,7,12,20,34,49,70}
a(94)=9 from {0,1,3,7,15,24,35,40,53}
a(95)=9 from {0,1,3,7,12,20,34,44,60}
a(96)=9 from {0,1,3,7,12,20,30,46,61}
a(97)=9 from {0,1,3,7,12,20,30,45,61}
a(98)=9 from {0,1,3,7,12,20,30,46,77}
a(99)=9 from {0,1,3,7,12,20,30,46,78}
a(100)=9 from {0,1,3,7,12,20,30,64,79}
a(101)=9 from {0,1,3,7,12,20,30,56,70}
a(102)=9 from {0,1,3,7,12,20,30,44,69}
a(103)=9 from {0,1,3,7,12,20,30,45,69}
a(104)=9 from {0,1,3,7,12,20,30,44,65}
a(105)=9 from {0,1,3,7,12,20,30,44,70}
a(106)=9 from {0,1,3,7,12,20,30,45,66}
a(107)=10 from {0,1,3,8,20,46,68,74,83,97}
a(108)=10 from {0,1,3,12,26,39,46,61,79,103}
a(109)=10 from {0,1,3,7,12,42,59,78,88,96}
a(110)=10 from {0,1,3,7,17,37,49,84,89,102}
a(111)=10 from {0,1,3,7,12,20,35,45,61,75}
a(112)=10 from {0,1,3,7,16,24,46,65,75,101}
a(113)=10 from {0,1,3,7,12,22,39,59,72,90}
a(114)=10 from {0,1,3,7,12,36,55,68,76,99}
a(115)=10 from {0,1,3,7,12,27,52,60,81,99}
a(116)=10 from {0,1,3,7,12,20,36,57,75,85}
a(117)=10 from {0,1,3,7,12,20,36,58,76,90}
a(118)=10 from {0,1,3,7,12,22,36,52,75,93}
a(119)=10 from {0,1,3,7,12,20,30,44,65,80}
a(120)=11 from {0,1,3,20,31,35,45,53,58,74,114}
a(121)=10 from {0,1,3,7,12,20,30,46,86,100}
a(122)=10 from {0,1,3,7,12,20,34,49,59,99}
a(123)=10 from {0,1,3,7,12,20,30,46,67,82}
a(124)=10 from {0,1,3,7,12,20,34,55,80,95}
a(125)=10 from {0,1,3,7,12,20,30,46,90,104}
a(126)=10 from {0,1,3,7,12,20,30,55,89,105}
a(127)=10 from {0,1,3,7,12,20,30,44,72,94}
a(128)=10 from {0,1,3,7,12,20,30,44,78,93}
a(129)=10 from {0,1,3,7,12,20,30,45,69,95}
a(130)=10 from {0,1,3,7,12,20,30,46,78,93}
a(131)=10 from {0,1,3,7,12,20,30,44,70,86}
a(132)=10 from {0,1,3,7,12,20,30,44,65,93}
a(133)=12 from {0,1,3,12,20,34,38,81,88,94,104,109}
a(134)=10 from {0,1,3,7,12,20,30,44,65,80}
a(135)=11 from {0,1,3,7,23,35,49,73,78,117,125}
a(136)=11 from {0,1,3,7,26,35,43,55,65,76,92}
a(137)=11 from {0,1,3,7,12,43,60,73,93,112,122}
a(138)=11 from {0,1,3,7,19,65,86,91,106,114,128}
a(139)=11 from {0,1,3,7,12,29,39,62,86,105,126}
a(140)=11 from {0,1,3,7,12,27,44,58,80,93,122}
a(141)=11 from {0,1,3,7,15,20,52,61,79,108,118}
a(142)=11 from {0,1,3,7,12,27,45,67,92,113,126}
a(143)=11 from {0,1,3,7,12,20,55,70,84,106,116}
a(144)=11 from {0,1,3,7,12,22,40,69,96,113,121}
a(145)=11 from {0,1,3,7,12,20,48,69,92,106,130}
a(146)=11 from {0,1,3,7,12,20,43,58,72,99,121}
a(147)=11 from {0,1,3,7,12,20,30,65,79,111,126}
a(148)=11 from {0,1,3,7,12,20,35,45,61,85,112}
a(149)=11 from {0,1,3,7,12,20,30,65,80,112,128}
a(150)=11 from {0,1,3,7,12,20,30,44,86,102,117}
a(151)=11 from {0,1,3,7,12,20,34,66,103,113,128}
a(152)=11 from {0,1,3,7,12,20,30,74,100,116,131}
a(153)=11 from {0,1,3,7,12,20,30,44,72,98,120}
a(154)=11 from {0,1,3,7,12,20,30,44,69,103,119}
a(155)=11 from {0,1,3,7,12,20,30,54,75,97,123}
a(156)=12 from {0,1,3,10,18,32,38,43,59,89,93,112}
a(157)=11 from {0,1,3,7,12,20,30,46,84,99,136}
a(158)=12 from {0,1,3,7,22,57,89,97,106,117,122,135}
a(159)=12 from {0,1,3,7,30,35,44,68,90,110,141,149}
a(160)=11 from {0,1,3,7,12,20,30,51,79,103,125}
a(161)=12 from {0,1,3,8,38,51,77,108,117,140,144,150}
a(162)=12 from {0,1,3,7,12,37,56,76,91,104,122,136}
a(163)=12 from {0,1,3,7,16,41,67,72,89,109,117,152}
a(164)=12 from {0,1,3,8,17,30,49,87,105,120,130,141}
a(165)=12 from {0,1,3,7,23,38,51,59,68,93,125,139}
a(166)=12 from {0,1,3,8,27,31,42,64,74,80,109,149}
a(167)=12 from {0,1,3,7,16,35,49,102,113,123,131,143}
a(168)=13 from {0,1,3,11,30,34,46,83,103,108,121,147,162}
a(169)=12 from {0,1,3,7,12,59,76,89,109,130,144,154}
a(170)=12 from {0,1,3,7,12,28,47,69,79,117,140,153}
a(171)=12 from {0,1,3,7,12,26,60,80,96,109,131,141}
a(172)=12 from {0,1,3,7,12,26,36,53,85,107,115,128}
a(173)=12 from {0,1,3,7,12,20,38,48,78,92,124,151}
a(174)=12 from {0,1,3,7,12,26,39,60,68,84,101,131}
a(175)=12 from {0,1,3,7,12,20,35,84,109,125,139,149}
a(176)=12 from {0,1,3,7,12,22,38,62,98,106,131,149}
a(177)=12 from {0,1,3,7,12,20,38,54,68,93,120,156}
a(178)=12 from {0,1,3,7,12,20,30,44,72,98,123,145}
a(179)=12 from {0,1,3,7,12,20,34,63,86,104,144,154}
a(180)=12 from {0,1,3,7,12,20,35,56,82,107,123,150}
a(181)=12 from {0,1,3,7,12,20,30,44,69,90,130,146}
a(182)=12 from {0,1,3,7,12,20,34,58,100,110,135,153}
a(183)=14 from {0,1,3,16,23,28,42,76,82,86,119,137,154,175}
a(184)=12 from {0,1,3,7,12,20,30,46,70,84,105,136}
a(185)=12 from {0,1,3,7,12,20,30,62,76,101,148,164}
a(186)=12 from {0,1,3,7,12,20,34,57,78,104,147,157}
a(187)=12 from {0,1,3,7,12,20,30,44,78,106,127,152}
a(188)=12 from {0,1,3,7,12,20,30,52,66,90,116,147}
a(189)=12 from {0,1,3,7,12,20,30,44,65,91,107,141}
a(190)=12 from {0,1,3,7,12,20,30,44,78,94,130,151}
a(191)=12 from {0,1,3,7,12,20,30,44,69,100,116,158}
a(192)=12 from {0,1,3,7,12,20,30,44,65,93,115,153}
a(193)=13 from {0,1,3,10,14,26,56,83,88,135,153,159,174}
a(194)=13 from {0,1,3,8,19,23,29,64,77,91,115,124,158}
a(195)=13 from {0,1,3,9,42,46,63,74,93,146,160,173,180}
a(196)=13 from {0,1,3,7,16,26,37,69,109,121,126,148,168}
a(197)=13 from {0,1,3,7,12,48,61,77,114,141,158,166,176}
a(198)=13 from {0,1,3,7,17,35,47,56,114,129,137,174,179}
a(199)=13 from {0,1,3,7,12,27,37,45,76,97,111,143,183}
a(200)=13 from {0,1,3,7,15,25,53,64,69,95,124,167,180}
a(201)=13 from {0,1,3,7,12,75,93,103,124,146,154,169,188}
a(202)=13 from {0,1,3,7,15,25,54,63,74,90,95,159,172}
a(203)=13 from {0,1,3,7,12,20,36,50,82,110,137,147,162}
a(204)=13 from {0,1,3,7,12,27,37,45,59,99,127,140,156}
a(205)=13 from {0,1,3,7,12,22,30,46,66,107,124,138,180}
a(206)=13 from {0,1,3,7,12,20,54,76,86,111,125,148,163}
a(207)=13 from {0,1,3,7,12,22,36,62,92,108,131,156,176}
a(208)=13 from {0,1,3,7,12,20,43,59,89,103,130,154,183}
a(209)=13 from {0,1,3,7,12,20,36,61,79,117,127,159,182}
a(210)=13 from {0,1,3,7,12,22,49,63,80,88,120,158,187}
a(211)=13 from {0,1,3,7,12,20,34,57,81,129,147,172,182}
a(212)=13 from {0,1,3,7,12,20,30,86,120,135,151,173,187}
a(213)=13 from {0,1,3,7,12,20,30,56,70,103,127,148,179}
a(214)=13 from {0,1,3,7,12,20,30,45,66,94,116,142,174}
a(215)=13 from {0,1,3,7,12,20,30,55,81,112,128,156,177}
a(216)=13 from {0,1,3,7,12,20,30,51,65,89,121,136,162}
a(217)=13 from {0,1,3,7,12,20,30,44,66,92,108,147,168}
a(218)=13 from {0,1,3,7,12,20,30,44,79,95,117,164,185}
a(219)=13 from {0,1,3,7,12,20,30,44,82,129,155,171,186}
a(220)=13 from {0,1,3,7,12,20,30,45,69,85,128,160,186}
a(221)=13 from {0,1,3,7,12,20,30,54,68,113,134,149,189}
a(222)=13 from {0,1,3,7,12,20,30,46,79,104,135,172,187}
a(223)=13 from {0,1,3,7,12,20,30,44,75,109,131,157,173}
a(224)=13 from {0,1,3,7,12,20,30,44,78,109,131,164,185}
a(225)=14 from {0,1,3,9,16,39,56,61,81,107,131,193,197,207}
a(226)=14 from {0,1,3,8,19,34,63,69,101,105,153,180,204,217}
a(227)=14 from {0,1,3,7,12,29,37,52,72,96,110,142,152,173}
a(228)=14 from {0,1,3,9,16,33,72,76,90,101,113,178,183,209}
a(229)=14 from {0,1,3,7,17,53,64,76,91,96,104,130,174,211}
a(230)=14 from {0,1,3,21,35,40,101,137,145,152,161,178,208,220}
a(231)=14 from {0,1,3,7,20,44,53,80,134,145,168,176,206,216}
a(232)=14 from {0,1,3,7,23,28,36,68,77,87,125,140,177,221}
a(233)=14 from {0,1,3,7,12,29,83,125,135,143,168,183,199,213}
a(234)=14 from {0,1,3,7,28,48,60,70,78,83,94,109,183,197}
a(235)=14 from {0,1,3,7,12,33,41,57,76,103,128,150,170,187}
a(236)=14 from {0,1,3,7,23,37,87,129,146,158,185,190,218,228}
a(237)=14 from {0,1,3,7,12,25,69,77,105,124,155,165,195,211}
a(238)=14 from {0,1,3,7,16,30,35,55,66,76,88,133,159,177}
a(239)=14 from {0,1,3,7,12,22,42,55,102,130,146,175,183,215}
a(240)=14 from {0,1,3,7,12,51,84,98,115,136,172,185,215,225}
a(241)=14 from {0,1,3,7,12,29,53,92,129,139,154,174,187,210}
a(242)=14 from {0,1,3,7,12,26,54,67,75,102,132,163,209,225}
a(243)=14 from {0,1,3,7,12,22,36,59,67,84,124,137,175,216}
a(244)=14 from {0,1,3,7,12,25,33,70,84,113,130,149,169,203}
a(245)=14 from {0,1,3,7,12,20,42,70,95,119,135,167,201,219}
a(246)=14 from {0,1,3,7,12,20,35,53,80,96,147,161,183,209}
a(247)=14 from {0,1,3,7,12,20,42,60,75,96,106,140,198,222}
a(248)=14 from {0,1,3,7,12,20,36,70,121,143,158,168,189,207}
a(249)=14 from {0,1,3,7,12,20,30,52,67,95,121,145,179,193}
a(250)=14 from {0,1,3,7,12,20,34,55,80,116,139,163,181,213}
a(251)=14 from {0,1,3,7,12,20,30,54,80,95,116,151,182,214}
a(252)=14 from {0,1,3,7,12,20,38,66,82,96,106,139,203,230}
a(253)=14 from {0,1,3,7,12,20,30,45,73,94,108,154,170,206}
a(254)=14 from {0,1,3,7,12,20,30,45,61,85,107,135,186,218}
a(255)=16 from {0,1,3,7,15,26,31,53,63,98,107,127,140,176,197,215}
a(256)=14 from {0,1,3,7,12,20,30,44,65,111,139,170,186,208}
a(257)=14 from {0,1,3,7,12,20,30,45,61,82,114,128,154,201}
a(258)=14 from {0,1,3,7,12,20,30,56,101,116,153,186,211,227}
a(259)=14 from {0,1,3,7,12,20,30,45,69,95,109,155,186,208}
a(260)=14 from {0,1,3,7,12,20,30,51,65,87,111,143,158,184}
a(261)=14 from {0,1,3,7,12,20,30,44,77,93,108,143,164,222}
a(262)=14 from {0,1,3,7,12,20,30,44,72,111,145,160,185,206}
a(263)=14 from {0,1,3,7,12,20,30,44,72,136,162,184,209,230}
a(264)=14 from {0,1,3,7,12,20,30,44,101,127,155,189,204,229}
a(265)=14 from {0,1,3,7,12,20,30,44,65,90,116,138,166,197}
a(266)=14 from {0,1,3,7,12,20,30,44,89,110,167,182,215,231}
a(267)=15 from {0,1,3,9,16,20,44,74,137,164,169,198,219,231,245}
a(268)=15 from {0,1,3,9,28,69,126,133,157,178,196,218,222,234,254}
a(269)=15 from {0,1,3,8,38,51,61,105,162,174,178,189,198,230,244}
a(270)=15 from {0,1,3,10,46,54,78,119,125,159,182,186,221,242,258}
a(271)=15 from {0,1,3,8,55,59,71,85,104,119,128,193,233,243,254}
a(272)=16 from {0,1,4,11,23,29,31,88,121,134,158,179,194,220,229,234}
a(273)=17 from {0,1,3,7,15,31,63,90,116,127,136,181,194,204,233,238,255}
a(274)=15 from {0,1,3,7,53,78,87,111,143,160,172,211,234,239,255}
a(275)=15 from {0,1,3,7,12,31,45,53,74,100,110,135,158,195,212}
a(276)=15 from {0,1,3,7,12,81,91,104,124,146,163,177,213,231,239}
a(277)=15 from {0,1,3,7,12,22,46,86,106,156,164,187,223,236,252}
a(278)=15 from {0,1,3,7,16,26,44,109,133,154,181,193,223,228,245}
a(279)=15 from {0,1,3,7,12,34,55,114,129,139,176,190,214,222,263}
a(280)=15 from {0,1,3,7,12,28,42,60,80,106,130,149,196,225,247}
a(281)=15 from {0,1,3,7,12,31,46,60,73,95,111,128,151,169,195}
a(282)=15 from {0,1,3,7,12,26,36,56,136,157,174,196,211,224,242}
a(283)=15 from {0,1,3,7,12,22,59,77,91,116,162,188,222,242,255}
a(284)=15 from {0,1,3,7,12,22,46,54,94,112,138,167,208,235,271}
a(285)=15 from {0,1,3,7,12,20,47,111,132,147,171,199,213,229,254}
a(286)=15 from {0,1,3,7,12,20,35,71,108,126,151,165,189,211,237}
a(287)=15 from {0,1,3,7,12,20,42,58,76,103,128,156,177,200,240}
a(288)=17 from {0,1,3,8,29,64,68,81,105,115,121,130,200,214,246,258,269}
a(289)=15 from {0,1,3,7,12,20,34,59,112,122,160,176,205,220,266}
a(290)=15 from {0,1,3,7,12,20,35,49,74,104,140,167,191,212,250}
a(291)=15 from {0,1,3,7,12,20,30,44,69,103,129,151,179,240,256}
a(292)=15 from {0,1,3,7,12,20,34,52,80,96,119,134,155,184,221}
a(293)=15 from {0,1,3,7,12,20,30,62,107,132,146,204,225,240,256}
a(294)=15 from {0,1,3,7,12,20,36,73,112,122,166,181,207,249,263}
a(295)=15 from {0,1,3,7,12,20,34,49,70,100,125,135,153,217,255}