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 A184878 #13 Mar 30 2012 16:52:00 %S A184878 0,0,0,0,225,2304,12916,52480,172810,489280,1234948,2846272,6092515, %T A184878 12263680,23434840,42828032,75296468,127959680,211022360,338814080, %U A184878 531091781,814651904,1225304300,1810265600,2631035550,3766825920,5318617980,7413931200,10212392775,13912204800,18757613424,25047492096,33145159080,43489557760,56607936880,73130176768,93804916777,119517648640,151310950180,190407043840 %N A184878 Third column (negated) of triangle in A182971. %C A184878 These are scaled central factorial numbers. %Y A184878 Cf. A182971. %K A184878 nonn %O A184878 1,5 %A A184878 _N. J. A. Sloane_, Feb 01 2011