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 A191268 #4 Mar 30 2012 18:57:31 %S A191268 9,18,35,44,61,70,76,85,94,111,120,137,146,152,161,170,187,196,213, %T A191268 230,239,256,265,282,291,297,306,315,332,341,358,367,373,382,391,408, %U A191268 417,434,451,460,477,486,503,512,518,527,536,553,562,579,588,594,603,612,629,638,644,653,662,679,688,705,714,720,729,738,755,764 %N A191268 Positions of 2 in A191265. %C A191268 See A191265. %t A191268 (See A191265.) %Y A191268 Cf. A191265, A191250. %K A191268 nonn %O A191268 1,1 %A A191268 _Clark Kimberling_, May 28 2011