A088535 - OEIS

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A088535

n representable as x^2+xy+y^2 and such that 3 divides sigma(n).

2

49, 147, 169, 196, 361, 441, 507, 588, 637, 676, 784, 931, 961, 1083, 1183, 1225, 1323, 1369, 1444, 1519, 1521, 1764, 1813, 1849, 1911, 2028, 2107, 2352, 2527, 2548, 2704, 2793, 2883, 2989, 3136, 3211, 3249, 3283, 3549, 3577, 3675, 3721, 3724, 3844, 3871

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

FORMULA

n in A003136 and in A087943

CROSSREFS

Sequence in context: A316121 A087354 A098442 * A045897 A162942 A027469

Adjacent sequences: A088532 A088533 A088534 * A088536 A088537 A088538

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Nov 16 2003

EXTENSIONS

More terms from David Wasserman, Aug 09 2005

STATUS

approved