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 A190850 #4 Mar 30 2012 18:57:29 %S A190850 1,2,3,4,5,7,8,10,11,14,15,16,19,20,22,23,27,28,29,31,32,39,40,41,43, %T A190850 44,46,47,55,56,58,59,63,64,65,68,75,79,80,82,83,86,87,88,91,92,94,95, %U A190850 107,111,112,115,116,118,119,122,123,127,128,130,131,136,137,140,155,159,160,163,164,166,167,171,172,173,175,176,183,184,187 %N A190850 Integers in (1+A190807)/3; contains A190807 as a proper subsequence. %C A190850 See A190803. %t A190850 (See A190807.) %Y A190850 Cf. A190803, A190807, A190849. %K A190850 nonn %O A190850 1,2 %A A190850 _Clark Kimberling_, May 25 2011