This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A304823 #4 May 19 2018 12:00:07
%S A304823 1,3,9,30,102,361,1308,4819,17970,67614,256156,975742,3733255,
%T A304823 14336290,55224880,213298817,825741010,3203142338,12447523904,
%U A304823 48448301960,188838707898,736985826174,2879588370517,11263139964066,44096779183060,172797721166402
%N A304823 Convolution of number of partitions into distinct parts and central binomial coefficients.
%F A304823 a(n) ~ QPochhammer[-1, 1/4] * 2^(2*n-1) / sqrt(Pi*n).
%t A304823 Table[Sum[PartitionsQ[n-k]*Binomial[2*k, k], {k, 0, n}], {n, 0, 25}]
%Y A304823 Cf. A000009, A000984, A292617, A304824.
%K A304823 nonn
%O A304823 0,2
%A A304823 _Vaclav Kotesovec_, May 19 2018