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 A190849 #9 Mar 17 2014 02:00:12
%S A190849 1,2,4,5,7,8,10,11,14,16,20,22,23,28,29,32,34,40,41,43,44,46,47,56,58,
%T A190849 59,61,64,65,68,70,80,82,83,86,88,92,94,95,97,112,116,118,119,122,124,
%U A190849 128,130,131,136,137,140,142,160,164,166,167,172,173,176,178,184,188,190,191,194,196,203,205,224,232,236,238,239,244,245,248
%N A190849 Integers in (A190807)/2; contains A190807 as a proper subsequence.
%C A190849 See A190803.
%t A190849 Intersection[Union[Flatten[NestList[{2 #, 3 # - 1} &, 1, 9]]]/2, Range[1, 300]]
%Y A190849 Cf. A190803, A190807, A190850.
%K A190849 nonn
%O A190849 1,2
%A A190849 _Clark Kimberling_, May 25 2011