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 A126452 #5 Oct 09 2014 17:47:59
%S A126452 1,4,45,1140,52360,3819816,406481544,59487568920,11468588169060,
%T A126452 2818651865383860,860587163078645431,319667046321630491484,
%U A126452 141992594868360194121800,74339194732961502662043600
%N A126452 Column 1 of triangle A126450; a(n) = C( C(n+3,3), n).
%t A126452 Table[Binomial[Binomial[n+3,3],n],{n,0,20}] (* _Harvey P. Dale_, Oct 09 2014 *)
%o A126452 (PARI) a(n)=binomial((n+1)*(n+2)*(n+3)/3!, n)
%Y A126452 Cf. A126450; A126451, A126453; A126447, A126456, A126459.
%K A126452 nonn
%O A126452 0,2
%A A126452 _Paul D. Hanna_, Dec 27 2006