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 A169633 #7 Apr 10 2014 00:16:22 %S A169633 1,3,7,13,21,11,23,9,25,43,63,41,17,43,15,45,79,113,77,39,79,37,81,35, %T A169633 83,33,85,31,87,29,89,27,91,157,225,155,227,153,75,153,73,155,71,157, %U A169633 69,159,67,161,65,163,265,367,263,369,261,151,265,379,495,377,259,137,261 %N A169633 The odd terms in Recamán's sequence (A005132). %K A169633 nonn %O A169633 1,2 %A A169633 _Eric Desbiaux_, Mar 15 2010 %E A169633 More terms from _R. J. Mathar_, Oct 09 2010