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%I A356184 #22 Sep 12 2022 11:42:17
%S A356184 1,1,2,1,2,4,1,2,3,6,1,2,3,4,6,1,2,3,4,6,12,1,2,3,4,6,8,12,1,2,3,4,5,
%T A356184 6,10,12,1,2,3,4,5,6,8,10,12,1,2,3,4,5,6,8,9,10,12,1,2,3,4,5,6,7,8,9,
%U A356184 10,12,14,1,2,3,4,5,6,7,8,9,10,12,14,15,18,20,1,2,3,4,5,6,7,8,9,10,12,14,15,18,20,24
%N A356184 Triangle read by rows: n-th row gives the indices of the n repunits that divide A340549(n).
%e A356184 Triangle begins:
%e A356184   1;
%e A356184   1,  2;
%e A356184   1,  2,  4;
%e A356184   1,  2,  3,  6;
%e A356184   1,  2,  3,  4,  6;
%e A356184   1,  2,  3,  4,  6, 12;
%e A356184   1,  2,  3,  4,  6,  8, 12;
%e A356184   1,  2,  3,  4,  5,  6, 10, 12;
%e A356184   1,  2,  3,  4,  5,  6,  8, 10, 12;
%e A356184   1,  2,  3,  4,  5,  6,  8,  9, 10, 12;
%e A356184   1,  2,  3,  4,  5,  6,  8,  9, 10, 12, 18;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14, 18;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14, 15, 18;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14, 15, 18, 20;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14, 15, 18, 20, 24;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14, 15, 16, 18, 20, 24;
%e A356184   1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 12, 14, 15, 16, 18, 20, 24, 30;
%e A356184   ...
%e A356184 The 5th row is {1, 2, 3, 4, 6} since A340549(5) = 11222211 is the least integer that is divisible by five repunits and these are R_1, R_2, R_3, R_4 and R_6.
%Y A356184 Cf. A002275, A004023, A083230, A340549.
%K A356184 nonn,base,tabl
%O A356184 1,3
%A A356184 _Bernard Schott_, Jul 28 2022

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