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 A126464 #3 Mar 30 2012 18:37:02
%S A126464 1,2,3,8,50,635,13389,420865,18491156,1084804118,82081329459,
%T A126464 7794746829520,908790397019076,127745867968533747,
%U A126464 21322592031518420776,4171751138526111626665,946103460280012610769060
%N A126464 Row sums of triangle A126460.
%o A126464 (PARI) {a(n)=sum(k=0,n,abs((matrix(n+1,n+1,r,c, binomial((c-1)*c*(c+1)/3!-k*(k+1)*(k+2)/3!+r-c,r-c))^-1)[n+1,k+1]))}
%Y A126464 Cf. A126460; A126461, A126462, A126463.
%K A126464 nonn
%O A126464 0,2
%A A126464 _Paul D. Hanna_, Dec 27 2006