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 A124536 #5 Jun 14 2017 00:12:33
%S A124536 1,1,7,49,343,2401,9430,65810,480077,3637345,28502254,230271472,
%T A124536 1913354190,16318251874,142611810220,1275372111383,11657396456231,
%U A124536 108792892306605,1035708759921763,10049835806235885,99321845447658052
%N A124536 Row 6 of rectangular table A124530.
%C A124536 In table A124530, the g.f. of row n, R_n(y), simultaneously satisfies: R_n(y) = Sum_{k>=0} y^k*R_k(y)^(n*k) for n>=0.
%F A124536 G.f.: A(x) = Sum_{n>=0} x^n*R_n(x)^(6n), where R_n(x) is the g.f. of row n in table A124530.
%o A124536 (PARI) a(n)=local(R);R=vector(n+7,r,vector(n+7,c,if(r==1 || c<=2,1,r^(c-2)))); for(i=0,n,for(r=0,n,R[r+1]=Vec(sum(c=0,n,x^c*Ser(R[c+1])^(r*c)+O(x^(n+1)))))); R[7][n+1]
%Y A124536 Cf. A124530 (table); other rows: A124531, A124532, A124533, A124534, A124535.
%K A124536 nonn
%O A124536 0,3
%A A124536 _Paul D. Hanna_, Nov 05 2006