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 A136588 #2 Mar 30 2012 18:37:09
%S A136588 1,1,2,21,124,1880,20046,391419,6195288,147481299,3121373690,
%T A136588 87790122816,2329580861268,75790954533385,2415630777959686,
%U A136588 89478235732836705,3323789119614522416,138402773923330655700
%N A136588 a(n) = Sum_{k=0..n} A136595(n,k)*n^k.
%o A136588 (PARI) {a(n)=sum(k=0,n,if(k==0,0^n,n^k*n!/(k-1)!* sum(i=0,n-1,(-1)^i*polcoeff(((exp(x+x*O(x^n))-1)^(k+i)),n)*binomial(2*i+k,i)/(2*i+k))))}
%Y A136588 Cf. A136595; A048287, A136596, A136597; A136589.
%K A136588 nonn
%O A136588 0,3
%A A136588 _Paul D. Hanna_, Jan 10 2008