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 A104661 #13 Nov 01 2011 12:57:16 %S A104661 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26, %T A104661 27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49, %U A104661 50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68 %N A104661 Duplicate of A020725. %K A104661 dead %O A104661 1,1