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!)
A304877 G.f.: Sum_{k>=0} q(k)^2 * x^k / Sum_{k>=0} q(k)*x^k, where q(n) is A000009(n). 7

%I #10 May 21 2018 07:48:27

%S 1,0,0,2,0,4,4,8,4,20,20,28,38,52,80,128,128,176,300,316,476,648,832,

%T 972,1428,1720,2340,3014,3844,4588,6556,7476,9760,12588,15596,19480,

%U 25140,29796,37728,47604,58140,70856,90148,107692,133228,167284,198692,242728

%N G.f.: Sum_{k>=0} q(k)^2 * x^k / Sum_{k>=0} q(k)*x^k, where q(n) is A000009(n).

%H Seiichi Manyama, <a href="/A304877/b304877.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) ~ sqrt(3) * exp(Pi*sqrt(n)) / (2^(11/2) * n^(3/2)).

%t nmax = 50; CoefficientList[Series[Sum[PartitionsQ[k]^2*x^k, {k, 0, nmax}] / Sum[PartitionsQ[k]*x^k, {k, 0, nmax}], {x, 0, nmax}], x]

%Y Cf. A000009, A054440, A304873, A304878.

%K nonn

%O 0,4

%A _Vaclav Kotesovec_, May 20 2018

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 April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)