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 A047094 #4 Mar 30 2012 18:56:53 %S A047094 1,4,13,38,98,531,1912,8138,31418,126393,495376,1962086,7714610, %T A047094 30417808,119689616,471372482,1855574610,7307585933,28780361988, %U A047094 113386055388,446810002208,1761249761801,6944518447036,27390257810022 %N A047094 T(n,n-3), array T as in A047089. %K A047094 nonn %O A047094 3,2 %A A047094 _Clark Kimberling_