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 A126455 #5 Dec 08 2018 13:39:39
%S A126455 1,3,15,220,7315,435897,40475358,5373200880,962889794295,
%T A126455 223581013518060,65230517839369311,23345156728397937888,
%U A126455 10052806195411162278095,5126493560257678027274800
%N A126455 Column 0 of triangle A126454; a(n) = C( C(n+2,3) + 2, n).
%t A126455 Table[Binomial[Binomial[n+2,3]+2,n],{n,0,20}] (* _Harvey P. Dale_, Dec 08 2018 *)
%o A126455 (PARI) a(n)=binomial(n*(n+1)*(n+2)/3!+2, n)
%Y A126455 Cf. A126454, A126456; A126446, A126451, A126458.
%K A126455 nonn
%O A126455 0,2
%A A126455 _Paul D. Hanna_, Dec 27 2006