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 A054095 #4 Mar 30 2012 18:57:02 %S A054095 1,10,22,108,544,3370,24030,195172,1777648,17950554,199059670, %T A054095 2405063020,31448531952,442501797658,6666753146494,107081325959940, %U A054095 1826636018849440 %N A054095 T(n,n-3), array T as in A054090. %K A054095 nonn %O A054095 3,2 %A A054095 _Clark Kimberling_