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!)
A022611 Expansion of Product_{m>=1} (1+q^m)^(-16). 3

%I #15 Apr 05 2017 09:50:34

%S 1,-16,120,-576,2076,-6304,17344,-44416,106630,-242480,528608,

%T -1112128,2265656,-4486112,8666112,-16376192,30328593,-55145872,

%U 98613424,-173670400,301550788,-516747872,874774016,-1464096000

%N Expansion of Product_{m>=1} (1+q^m)^(-16).

%H Seiichi Manyama, <a href="/A022611/b022611.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) ~ (-1)^n * exp(Pi*2 * sqrt(2*n/3)) / (2^(3/4) * 3^(1/4) * n^(3/4)). - _Vaclav Kotesovec_, Aug 27 2015

%F a(0) = 1, a(n) = -(16/n)*Sum_{k=1..n} A000593(k)*a(n-k) for n > 0. - _Seiichi Manyama_, Apr 05 2017

%t nmax = 50; CoefficientList[Series[Product[1/(1 + x^k)^16, {k, 1, nmax}], {x, 0, nmax}], x] (* _Vaclav Kotesovec_, Aug 27 2015 *)

%K sign,easy

%O 0,2

%A _N. J. A. Sloane_

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 12 01:38 EDT 2024. Contains 375082 sequences. (Running on oeis4.)