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A022723 Expansion of Product_{m>=1} (1+m*q^m)^-31. 2
1, -31, 434, -3627, 20367, -84537, 296825, -1027805, 3586700, -11522204, 33703882, -97807604, 289043659, -814257997, 2164448117, -5763699428, 15479115951, -40058137473, 100379076723, -252617470522, 633832842041 (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)^-31, {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)^-31)) \\ G. C. Greubel, Jul 20 2018

CROSSREFS

Sequence in context: A134071 A278964 A010836 * A084234 A187622 A187630

Adjacent sequences:  A022720 A022721 A022722 * A022724 A022725 A022726

KEYWORD

sign

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 22 22:22 EDT 2019. Contains 322378 sequences. (Running on oeis4.)