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 A190713 #4 Mar 30 2012 18:57:29 %S A190713 2,5,9,13,20,24,28,31,35,39,43,46,50,54,58,61,65,69,76,80,84,87,91,95, %T A190713 99,102,106,110,114,117,121,125,132,136,140,143,147,151,155,158,162, %U A190713 166,173,177,181,184,188,192,196,199,203,207,211,214,218,222,229,233,237,240,244,248,252,255,259,263,267,270,274,278,285,289,293 %N A190713 Positions of 2 in A190710. %C A190713 See A190710. %t A190713 (See A190710.) %Y A190713 Cf. A190710. %K A190713 nonn %O A190713 1,1 %A A190713 _Clark Kimberling_, May 17 2011