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 A190707 #4 Mar 30 2012 18:57:29 %S A190707 2,6,9,13,17,24,28,32,35,39,43,47,50,54,58,62,65,69,73,80,84,88,91,95, %T A190707 99,103,106,110,114,121,125,129,132,136,140,144,147,151,155,159,162, %U A190707 166,170,177,181,185,188,192,196,200,203,207,211,215,218,222,226,233,237,241,244,248,252,256,259,263,267,271,274,278,282,289,293 %N A190707 Positions of 2 in A190704. %C A190707 See A190704. %t A190707 (See A190704.) %Y A190707 Cf. A190704. %K A190707 nonn %O A190707 1,1 %A A190707 _Clark Kimberling_, May 17 2011