A022715 Expansion of Product_{m>=1} (1+m*q^m)^-23.

1, -23, 230, -1311, 4853, -14191, 44873, -154859, 454043, -1139765, 3085358, -8930785, 22848752, -53971892, 137067350, -351827803, 829356379, -1915368585, 4586707633, -10818772384, 24533286122, -55227022631

Offset: 0

Author

N. J. A. Sloane

Keywords

• sign

Links

• G. C. Greubel, Table of n, a(n) for n = 0..1000

Programs

Mathematica

With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-23, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 20 2018 *)

PARI

m=50; q='q+O('q^m); Vec(prod(n=1,m,(1+n*q^n)^-23)) \\ G. C. Greubel, Jul 20 2018