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!)
A259436 a(n) = Sum_{k=0..n} p(k)^k, where p(k) is the partition function A000041. 3

%I #7 Dec 01 2015 10:08:59

%S 1,2,6,33,658,17465,1789026,172648401,55048521937,19738048521937,

%T 17099936170199761,17002207325552593617,43456890729289136241538,

%U 113852784934058230923022839,667954362620824922543667163464,4816707198961510396593071163584840

%N a(n) = Sum_{k=0..n} p(k)^k, where p(k) is the partition function A000041.

%F a(n) ~ p(n)^n ~ exp(1/24 - 3/(4*Pi^2) - (72+Pi^2)*sqrt(n)/(24*sqrt(6)*Pi) + sqrt(2/3)*Pi*n^(3/2)) / (3^(n/2) * 4^n * n^n).

%t Table[Sum[PartitionsP[k]^k,{k,0,n}],{n,0,15}]

%Y Cf. A000041, A133018, A259373, A259399, A259437, A259438, A265095.

%K nonn

%O 0,2

%A _Vaclav Kotesovec_, Jun 27 2015

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 20 04:51 EDT 2024. Contains 371798 sequences. (Running on oeis4.)