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 A190859 #4 Mar 30 2012 18:57:29 %S A190859 1,2,3,4,6,7,9,10,13,14,15,18,19,21,22,26,27,28,30,31,38,39,40,42,43, %T A190859 45,46,54,55,57,58,62,63,64,67,74,78,79,81,82,85,86,87,90,91,93,94, %U A190859 106,110,111,114,115,117,118,121,122,126,127,129,130,135,136,139,154,158,159,162,163,165,166,170,171,172,174,175,182,183,186 %N A190859 Integers in (-1+A002977)/3; contains A002977 as a proper subsequence. %C A190859 See A190803. %t A190859 (See A190858.) %Y A190859 Cf. A190803, A002977, A190858. %K A190859 nonn %O A190859 1,2 %A A190859 _Clark Kimberling_, May 25 2011