login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Convolution of central binomial coefficients and partition numbers.
1

%I #4 May 19 2018 11:59:58

%S 1,3,10,33,113,397,1431,5249,19514,73260,277100,1054248,4029859,

%T 15463765,59531725,229816430,889301153,3448417251,13396337155,

%U 52126461984,203124067675,792559645912,3096104725974,12107810534937,47395948167885,185697860476576

%N Convolution of central binomial coefficients and partition numbers.

%F a(n) ~ 4^n / (QPochhammer[1/4] * sqrt(Pi*n)).

%t Table[Sum[PartitionsP[n-k]*Binomial[2*k, k], {k, 0, n}], {n, 0, 25}]

%Y Cf. A000041, A000984, A014329, A304823.

%K nonn

%O 0,2

%A _Vaclav Kotesovec_, May 19 2018