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%I #9 Jul 20 2018 03:47:12
%S 1,-23,230,-1311,4853,-14191,44873,-154859,454043,-1139765,3085358,
%T -8930785,22848752,-53971892,137067350,-351827803,829356379,
%U -1915368585,4586707633,-10818772384,24533286122,-55227022631
%N Expansion of Product_{m>=1} (1+m*q^m)^-23.
%H G. C. Greubel, <a href="/A022715/b022715.txt">Table of n, a(n) for n = 0..1000</a>
%t With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-23, {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)^-23)) \\ _G. C. Greubel_, Jul 20 2018
%K sign
%O 0,2
%A _N. J. A. Sloane_
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