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 A191183 #4 Mar 30 2012 18:57:30 %S A191183 1,2,3,5,9,11,13,15,20,21,27,29,37,39,45,47,53,61,63,81,83,85,101,109, %T A191183 111,117,119,135,137,149,157,159,181,182,183,189,191,213,243,245,253, %U A191183 255,263,325,327,333,335,341,351,353,405,407,425,437,445,447,469,471,477,479,541,543,549,551,567,569,597,629,637,639,725,729 %N A191183 Integers in (-1+A191129)/4; contains A191129 as a proper subsequence. %C A191183 See A191129, A191113. %t A191183 (See A191129.) %Y A191183 Cf. A199129, A191113. %K A191183 nonn %O A191183 1,2 %A A191183 _Clark Kimberling_, May 27 2011