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 A153248 #2 Mar 31 2012 13:21:17 %S A153248 0,0,1,1,2,1,0,2,1,3,1,0,2,2,3,1,3,3,1,1,0,2,2,4,1,0,2,3,3,1,3,3,2,1, %T A153248 1,3,2,4,1,0,2,3,2,2,4,4,1,1,0,2,3,2,2,0,3,1,2,3,3,2,3,1,1,3,2,5,1,0, %U A153248 2,4,3,1,3,3,3,1,2,4,2,4,1,0,2,3,2,2,4,4,2,1,1,3,3,2,2,0,4,2,2,4,4,2 %N A153248 Number of fleeing trees computed for Catalan bijection A123494. %C A153248 See comments at A153247. %o A153248 (MIT Scheme:) (define (A153248 n) (count-fleeing-trees n A123494)) %K A153248 nonn %O A153248 0,5 %A A153248 _Antti Karttunen_, Dec 22 2008