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 A126458 #3 Mar 30 2012 18:37:02 %S A126458 1,4,21,286,8855,501942,45057474,5843355957,1029873432159, %T A126458 236236542585120,68292983465630781,24268885951464043344, %U A126458 10392619362579990298763,5276256293478688846049120 %N A126458 Column 0 of triangle A126457; a(n) = C( C(n+2,3) + 3, n). %o A126458 (PARI) a(n)=binomial(n*(n+1)*(n+2)/3!+3, n) %Y A126458 Cf. A126457, A126459; A126446, A126451, A126455. %K A126458 nonn %O A126458 0,2 %A A126458 _Paul D. Hanna_, Dec 27 2006