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 A047112 #4 Mar 30 2012 18:56:53 %S A047112 1,1,2,10,29,91,370,1305,4626,17888,66824,248839,955688,3646596, %T A047112 13892482,53548120,206439059,795884541,3083453744,11962794031, %U A047112 46444491143,180751142106,704383034528,2747337971249,10730723024786 %N A047112 T(n,n), array T as in A047110. %K A047112 nonn %O A047112 0,3 %A A047112 _Clark Kimberling_