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 A054104 #4 Mar 30 2012 18:57:02 %S A054104 2,3,8,30,134,714,4462,32126,262362,2398738,24287222,269858022, %T A054104 3265282066,42745510682,601999275438,9076296768142,145869055202282, %U A054104 2489498542118946 %N A054104 T(n,2), array T as in A054098. %K A054104 nonn %O A054104 2,1 %A A054104 _Clark Kimberling_