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 A024969 #3 Mar 30 2012 18:56:00 %S A024969 1,3,5,7,8,11,13,15,17,18,21,22,23,25,28,31,34,35,38,39,41,45,46,48, %T A024969 50,51,53,54,56,57,60,62,63,65,68,72,73,76,77,80,81,82,85,89,91,92,93, %U A024969 94,97,99,100,103,104,107,108,110,111,113,115,116,120,123,125,128,130,132,134,135 %N A024969 Positions of odd numbers in A003072. %K A024969 nonn %O A024969 1,2 %A A024969 _Clark Kimberling_