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 A054094 #4 Mar 30 2012 18:57:02 %S A054094 1,4,6,26,104,548,3366,24034,195168,1777652,17950550,199059674, %T A054094 2405063016,31448531956,442501797654,6666753146498,107081325959936, %U A054094 1826636018849444 %N A054094 T(n,n-2), array T as in A054090. %K A054094 nonn %O A054094 2,2 %A A054094 _Clark Kimberling_