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A268501 Expansion of Product_{k>=1} ((1 + k*x^k) / (1 + x^k))^k. 2
1, 0, 2, 6, 11, 32, 60, 148, 279, 690, 1312, 2778, 5684, 11282, 22920, 44724, 87919, 168978, 329800, 623086, 1189794, 2235744, 4189442, 7795642, 14438670, 26577246, 48616050, 88724110, 160629612, 290267100, 521225220, 933031364, 1661954928, 2950946220 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Vaclav Kotesovec, Table of n, a(n) for n = 0..5000

MATHEMATICA

nmax = 50; CoefficientList[Series[Product[((1+k*x^k)/(1+x^k))^k, {k, 1, nmax}], {x, 0, nmax}], x]

CROSSREFS

Cf. A022629, A255528, A266891, A268500, A268502.

Sequence in context: A296390 A135048 A189319 * A026564 A243794 A318199

Adjacent sequences:  A268498 A268499 A268500 * A268502 A268503 A268504

KEYWORD

nonn

AUTHOR

Vaclav Kotesovec, Feb 06 2016

STATUS

approved

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Last modified May 24 18:34 EDT 2019. Contains 323534 sequences. (Running on oeis4.)