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 A096544 #3 Mar 30 2012 18:36:40 %S A096544 0,0,0,0,61,4385,219435,9785650,423038910,18400152960,820149026970, %T A096544 37821215615040,1813429065435075,90623195098916480, %U A096544 4724647736141458125,257000193714640346880,14579739601017142299020,861991467355420222464000 %N A096544 Formed from a secondary diagonal of triangle A096542 where a(n) = A096542(n,n-3)/4. %Y A096544 Cf. A096542, A096543, A057500. %K A096544 nonn %O A096544 0,5 %A A096544 _Paul D. Hanna_, Jun 25 2004