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 A126448 #3 Mar 30 2012 18:37:02 %S A126448 1,6,120,4495,270725,24040016,2967205528,487444845680,103073959989495, %T A126448 27319423696620550,8881600973913295056,3478625214672347911080, %U A126448 1616770762998304775695925,880246034121663208464847200 %N A126448 Column 2 of triangle A126445; a(n) = C( C(n+4,3) - 4, n). %o A126448 (PARI) a(n)=binomial((n+2)*(n+3)*(n+4)/3!-4, n) %Y A126448 Cf. A126445; A126446, A126447, A126449. %K A126448 nonn %O A126448 0,2 %A A126448 _Paul D. Hanna_, Dec 27 2006