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%I #10 Sep 08 2022 08:44:46
%S 1,-23,207,-782,-276,12259,-29578,-42711,229057,93863,-828023,
%T -2014110,4727719,15059963,-22586736,-58481962,-8654877,246061935,
%U 463250567,-671892192,-1993509889,-2171787581,5545061605,20642183588
%N Expansion of Product_{m>=1} (1-m*q^m)^23.
%H G. C. Greubel, <a href="/A022683/b022683.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 19 2018 *)
%o (PARI) m=50; q='q+O('q^m); Vec(prod(n=1,m,(1-n*q^n)^23)) \\ _G. C. Greubel_, Jul 19 2018
%o (Magma) Coefficients(&*[(1-m*x^m)^23: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_