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 A047118 #4 Mar 30 2012 18:56:53 %S A047118 1,4,14,53,195,711,2662,9973,37367,141472,537422,2045224,7821958, %T A047118 30001955,115296650,444336395,1716137440,6639137474,25732460158, %U A047118 99897347527,388339939659,1511670332538,5891647475819,22987227251180 %N A047118 T(n,n+3), array T as in A047110. %K A047118 nonn %O A047118 0,2 %A A047118 _Clark Kimberling_