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 A054105 #4 Mar 30 2012 18:57:02 %S A054105 4,11,36,148,758,4640,33018,267716,2436218,24587064,272556602, %T A054105 3292267868,43042354506,605561401328,9122604404714,146517362114292, %U A054105 2499223145799098 %N A054105 T(n,3), array T as in A054098. %K A054105 nonn %O A054105 3,1 %A A054105 _Clark Kimberling_