A093519 Numbers n with no representation as the sum of exactly 2 generalized pentagonal numbers.

11, 18, 21, 25, 32, 39, 43, 46, 49, 54, 60, 65, 67, 68, 74, 76, 81, 87, 88, 90, 95, 98, 106, 109, 111, 113, 116, 120, 123, 125, 130, 136, 137, 142, 144, 153, 158, 159, 163, 164, 165, 172, 173, 175, 179, 182, 186, 193, 197, 201, 204, 205, 207, 208, 214, 219, 220

Offset

1,1

Links

Table of n, a(n) for n=1..57.

Prog

(PARI)

Crossrefs

Cf. A001318 (generalized pentagonal numbers), A002107 (expansion of Product (1-x^k)^2, k=1..inf.), A093518.

Cf. A204382.

Sequence in context: A300062 A309489 A054306 * A031119 A242918 A287868

Adjacent sequences: A093516 A093517 A093518 * A093520 A093521 A093522

Keyword

nonn

Author

Jon Perry, Mar 29 2004

Status

approved