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A022720 Expansion of Product_{m>=1} (1+m*q^m)^-28. 2

%I

%S 1,-28,350,-2576,12593,-45892,149926,-514504,1734264,-5142508,

%T 14199108,-40931240,117876241,-311946824,796757922,-2104447072,

%U 5482534827,-13518654268,32992345904,-81755033080,198688497651

%N Expansion of Product_{m>=1} (1+m*q^m)^-28.

%H G. C. Greubel, <a href="/A022720/b022720.txt">Table of n, a(n) for n = 0..1000</a>

%t With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-28, {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)^-28)) \\ _G. C. Greubel_, Jul 20 2018

%K sign

%O 0,2

%A _N. J. A. Sloane_

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Last modified June 26 16:10 EDT 2022. Contains 354885 sequences. (Running on oeis4.)