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 A072790 #2 May 01 2014 02:47:43 %S A072790 0,1,3,13,38,230,6902,5963330,4445170540277,2469942641522759680444872, %T A072790 762577081551553466590743598512392989564579443140, %U A072790 72690475663460578305076472056787461439583062421562715705151023011944336192599271053989785936377 %N A072790 Maximum position in A072789 where the value n occurs. %o A072790 (define A072790 (max-n-fun-with-arithrank-scheme packA072734)) %Y A072790 Binary widths given by A072791. See the comment at A072787. %K A072790 nonn %O A072790 0,3 %A A072790 _Antti Karttunen_, Jun 12 2002