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A022639 Expansion of Product_{m>=1} (1 + m*q^m)^11. 2
1, 11, 77, 440, 2167, 9592, 39127, 149237, 538329, 1851674, 6111171, 19448573, 59922709, 179331603, 522723740, 1487454914, 4140279660, 11292030255, 30221623905, 79475723767, 205600559461, 523762010695, 1315113742769, 3257405396388, 7964974336693, 19239590761567 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MAPLE

[seq(coeff(series(mul((1+m*q^m)^(11), m=1..100), q, 101), q, j), j=0..25)]; # Muniru A Asiru, Feb 18 2018

MATHEMATICA

With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^11, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Feb 17 2018 *)

PROG

(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1+n*q^n)^11)) \\ G. C. Greubel, Feb 17 2018

(MAGMA) Coefficients(&*[(1+m*x^m)^11:m in [1..40]])[1..40] where x is PolynomialRing(Integers()).1; // G. C. Greubel, Feb 17 2018

CROSSREFS

Column k=11 of A297321.

Sequence in context: A303103 A258459 A320547 * A000589 A211830 A322877

Adjacent sequences:  A022636 A022637 A022638 * A022640 A022641 A022642

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified November 21 04:47 EST 2019. Contains 329350 sequences. (Running on oeis4.)