A022703 Expansion of Product_{m>=1} (1+m*q^m)^-11.

1, -11, 44, -77, 132, -638, 1771, -2464, 5687, -19371, 38533, -66793, 160710, -367730, 747219, -1458655, 2888787, -6357505, 12977239, -23575079, 47325498, -98587841, 187236499, -352094413, 684939838, -1333767820

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)^-11, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 19 2018 *)

PARI

m=50; q='q+O('q^m); Vec(prod(n=1,m,(1+n*q^n)^-11)) \\ G. C. Greubel, Jul 19 2018