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%I #10 Sep 08 2022 08:44:46
%S 1,-31,403,-2666,7254,17329,-187488,384865,916050,-4785594,267220,
%T 23607058,8499735,-138349218,-198872750,1055690151,1063384258,
%U -4561862102,-6887455628,9053067640,53042071422
%N Expansion of Product_{m>=1} (1-m*q^m)^31.
%H G. C. Greubel, <a href="/A022691/b022691.txt">Table of n, a(n) for n = 0..1000</a>
%t With[{nmax = 50}, CoefficientList[Series[Product[(1 - k*q^k)^31, {k, 1, nmax}], {q, 0, nmax}], q]] (* _G. C. Greubel_, Jul 19 2018 *)
%o (PARI) m=50; q='q+O('q^m); Vec(prod(n=1,m,(1-n*q^n)^31)) \\ _G. C. Greubel_, Jul 19 2018
%o (Magma) Coefficients(&*[(1-m*x^m)^31:m in [1..40]])[1..40] where x is PolynomialRing(Integers()).1; // _G. C. Greubel_, Jul 19 2018
%K sign
%O 0,2
%A _N. J. A. Sloane_
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