login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A022722 Expansion of Product_{m>=1} (1+m*q^m)^(-30). 2
1, -30, 405, -3250, 17460, -69456, 237485, -817830, 2827605, -8867120, 25403229, -73380060, 215448665, -595626330, 1559581965, -4136899912, 11020769280, -28085275230, 69659708200, -174426721890, 433560026502 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nmax = 50}, CoefficientList[Series[Product[(1 + k*q^k)^-30, {k, 1, nmax}], {q, 0, nmax}], q]] (* G. C. Greubel, Jul 20 2018 *)

PROG

(PARI) m=50; q='q+O('q^m); Vec(prod(n=1, m, (1+n*q^n)^-30)) \\ G. C. Greubel, Jul 20 2018

CROSSREFS

Sequence in context: A125442 A260913 A010835 * A278016 A282125 A296917

Adjacent sequences:  A022719 A022720 A022721 * A022723 A022724 A022725

KEYWORD

sign

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 18 00:36 EST 2022. Contains 350410 sequences. (Running on oeis4.)