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A022690
Expansion of Product_{m>=1} (1-m*q^m)^30.
2
1, -30, 375, -2350, 5625, 18594, -159470, 264000, 897090, -3531910, -1435527, 16983900, 18552080, -93541590, -225801585, 676209374, 1172571840, -2433574980, -6300652790, 673571550, 37882244124
OFFSET
0,2
LINKS
MATHEMATICA
With[{nmax = 50}, CoefficientList[Series[Product[(1 - k*q^k)^30, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 19 2018 *)
PROG
(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1-n*q^n)^30)) \\ G. C. Greubel, Jul 19 2018
(Magma) Coefficients(&*[(1-m*x^m)^30:m in [1..40]])[1..40] where x is PolynomialRing(Integers()).1; // G. C. Greubel, Jul 19 2018
CROSSREFS
Sequence in context: A042748 A202074 A251895 * A224332 A280478 A020927
KEYWORD
sign
STATUS
approved