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 A126449 #3 Mar 30 2012 18:37:02
%S A126449 1,2,10,163,5945,375819,36233754,4932046435,899372990826,
%T A126449 211481102358562,62283285977509563,22451501854089680715,
%U A126449 9722649026348549481236,4980474318644453218716459
%N A126449 Row sums of triangle A126445; a(n) = Sum_{k=0..n} C( C(n+2,3) - C(k+2,3), n-k).
%o A126449 (PARI) a(n)=sum(k=0,n,binomial(binomial(n+2,3)-binomial(k+2,3), n-k))
%Y A126449 Cf. A126445; A126446, A126447, A126448.
%K A126449 nonn
%O A126449 0,2
%A A126449 _Paul D. Hanna_, Dec 27 2006