login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A022677 Expansion of Product_{m>=1} (1-m*q^m)^17. 2
1, -17, 102, -153, -901, 3553, 833, -17255, -7242, 55726, 179554, -312834, -871675, 519911, 2354755, 5311378, -5680414, -24956018, -20075691, 28080107, 211837476, 126533397, -349645681, -974028090, -1206400835 (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)^17, {k, 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)^17)) \\ G. C. Greubel, Jul 18 2018

(MAGMA) Coefficients(&*[(1-m*x^m)^17:m in [1..40]])[1..40] where x is PolynomialRing(Integers()).1; // G. C. Greubel, Jul 18 2018

CROSSREFS

Sequence in context: A145943 A331950 A234693 * A275919 A229425 A041552

Adjacent sequences:  A022674 A022675 A022676 * A022678 A022679 A022680

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 August 5 19:54 EDT 2021. Contains 346488 sequences. (Running on oeis4.)