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 A124466 #3 Mar 30 2012 18:37:01
%S A124466 1,7,34,159,788,4117,22143,121079,670811,3764758,21408813,123367344,
%T A124466 720303998,4260491461,25523584313,154835572102,950950450917,
%U A124466 5911757419002,37193168793829,236764641742504,1524754216743136
%N A124466 Row 6 of rectangular table A124460.
%F A124466 G.f.: A(x) = Sum_{n>=0} x^n*R_n(x)^6, 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 A124466 (PARI) {a(n)=local(m=max(n,6),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[7][n+1]}
%Y A124466 Cf. A124460 (table); other rows: A124461, A124462, A124463, A124464, A124465.
%K A124466 nonn
%O A124466 0,2
%A A124466 _Paul D. Hanna_, Nov 03 2006