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A022719 Expansion of Product_{m>=1} (1+m*q^m)^-27. 2

%I

%S 1,-27,324,-2277,10584,-36882,118395,-406836,1347273,-3870993,

%T 10536993,-30432051,86382090,-223153434,565228773,-1490547915,

%U 3825187308,-9277759872,22515299145,-55438134588,132989193954

%N Expansion of Product_{m>=1} (1+m*q^m)^-27.

%H G. C. Greubel, <a href="/A022719/b022719.txt">Table of n, a(n) for n = 0..1000</a>

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

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

%K sign

%O 0,2

%A _N. J. A. Sloane_

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Last modified June 28 02:57 EDT 2022. Contains 354903 sequences. (Running on oeis4.)