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 A124465 #3 Mar 30 2012 18:37:01
%S A124465 1,6,26,111,506,2437,12118,61499,317485,1666371,8891543,48221602,
%T A124465 265708512,1486905853,8446728295,48690214869,284692228671,
%U A124465 1687855348715,10143257898587,61768997909283,381059689323080,2380852983417944
%N A124465 Row 5 of rectangular table A124460.
%F A124465 G.f.: A(x) = Sum_{n>=0} x^n*R_n(x)^5, where R_n(x) is the g.f. of row n in table A124460 and satisfies: R_n(x) = Sum_{k>=0} x^k * R_k(x)^n for n>=0.
%o A124465 (PARI) {a(n)=local(m=max(n,5),R=vector(m+1,r,vector(m+1,c,binomial(r+c-2,c-1)))); for(i=0,m,for(r=0,m,R[r+1]=Vec(sum(c=0,m,x^c*Ser(R[c+1])^r+O(x^(m+1))))));R[6][n+1]}
%Y A124465 Cf. A124460 (table); other rows: A124461, A124462, A124463, A124464, A124466.
%K A124465 nonn
%O A124465 0,2
%A A124465 _Paul D. Hanna_, Nov 03 2006