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 A126472 #4 Mar 30 2012 18:37:02 %S A126472 1,1,1,3,7,26,136,784,5189,40639,357638,3472240,37835023,449901885, %T A126472 5763035223,79697811456,1185091117180,18789393725696,316557520950918, %U A126472 5664877511610114,106815500916218123,2123415404236087790 %N A126472 Largest term in rows of triangle A126470, in which row sums equal factorials. %C A126472 In triangle A126470, row n lists coefficients of q in F(n,q) that satisfies: F(n,q) = Sum_{k=0..n-1} C(n-1,k)*F(k,q)*F(n-k-1,q)*q^k for n>0, with F(0,q) = 1. %e A126472 Row functions F(n,q) of triangle A126470 begin: %e A126472 F(0,q) = F(1,q) = 1; %e A126472 F(1,q) = 1 + q; %e A126472 F(2,q) = 1 + 3*q + q^2 + q^3; %e A126472 F(3,q) = 1 + 6*q + 7*q^2 + 5*q^3 + 3*q^4 + q^5 + q^6. %o A126472 (PARI) %Y A126472 Cf. A126470, A126471. %K A126472 nonn %O A126472 0,4 %A A126472 _Paul D. Hanna_, Dec 31 2006