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A093519 Numbers n with no representation as the sum of exactly 2 generalized pentagonal numbers. 5
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 (list; graph; refs; listen; history; text; internal format)
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: A072967 A232658 A054306 * A031119 A242918 A287868

Adjacent sequences:  A093516 A093517 A093518 * A093520 A093521 A093522

KEYWORD

nonn

AUTHOR

Jon Perry, Mar 29 2004

STATUS

approved

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Last modified February 25 22:44 EST 2018. Contains 299662 sequences. (Running on oeis4.)