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 A054097 #4 Mar 30 2012 18:57:02 %S A054097 3,8,26,108,554,3392,24138,195716,1781018,17974584,199254842, %T A054097 2406840668,31466482506,442700857328,6669158209514,107112774491892, %U A054097 1827078520647098 %N A054097 T(n,3), array T as in A054090. %K A054097 nonn %O A054097 3,1 %A A054097 _Clark Kimberling_