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 A104668 #2 Mar 30 2012 17:26:11 %S A104668 1,8,6,10,7,24,9,5,2,3,11,21,26,13,12,4,23,15,64,42,17,37,25,55,57,18, %T A104668 46,22,14,67,72,19,40,52,33,27,53,56,80,20 %N A104668 Position of n in A105834. %Y A104668 Cf. A105834. %K A104668 nonn %O A104668 1,2 %A A104668 _Zak Seidov_, Apr 22 2005