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A022719 Expansion of Product_{m>=1} (1+m*q^m)^-27. 2
1, -27, 324, -2277, 10584, -36882, 118395, -406836, 1347273, -3870993, 10536993, -30432051, 86382090, -223153434, 565228773, -1490547915, 3825187308, -9277759872, 22515299145, -55438134588, 132989193954 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

MATHEMATICA

With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-27, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 20 2018 *)

PROG

(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1+n*q^n)^-27)) \\ G. C. Greubel, Jul 20 2018

CROSSREFS

Sequence in context: A224311 A224375 A010832 * A290405 A048709 A268973

Adjacent sequences:  A022716 A022717 A022718 * A022720 A022721 A022722

KEYWORD

sign

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified May 20 03:09 EDT 2022. Contains 353850 sequences. (Running on oeis4.)