A022656 Expansion of Product_{m>=1} (1+m*q^m)^28.

1, 28, 434, 4928, 45619, 363804, 2584078, 16712728, 99967861, 559436136, 2954968758, 14835042600, 71185664242, 327991293140, 1456679962528, 6256129706904, 26054952884072, 105476694483636, 415919297844582

Offset

0,2

Links

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

Mathematica

With[{nmax=50}, CoefficientList[Series[Product[(1+m*q^m)^28, {m, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 18 2018 *)

Prog

(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1+n*q^n)^28)) \\ G. C. Greubel, Jul 18 2018
(Magma) Coefficients(&*[(1+m*x^m)^28:m in [1..40]])[1..50] where x is PolynomialRing(Integers()).1; // G. C. Greubel, Jul 18 2018

Crossrefs

Sequence in context: A096949 A093974 A121803 * A154588 A125485 A054337

Adjacent sequences: A022653 A022654 A022655 * A022657 A022658 A022659

Keyword

nonn

Author

N. J. A. Sloane

Status

approved