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 A054100 #4 Mar 30 2012 18:57:02 %S A054100 1,2,2,4,10,34,144,748,4606,32874,266968,2431612,24554190,272289634, %T A054100 3289836256,43017800316,605289111694,9119314568458,146474344313976, %U A054100 2498617856687404 %N A054100 T(n,n), array T as in A054098. %K A054100 nonn %O A054100 0,2 %A A054100 _Clark Kimberling_