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 A191146 #4 Mar 30 2012 18:57:30 %S A191146 1,2,4,6,8,10,14,16,22,28,38,40,46,54,62,64,72,82,86,110,112,118,136, %T A191146 150,158,160,182,184,190,200,214,244,246,254,256,326,328,334,342,352, %U A191146 406,438,446,448,456,470,472,478,542,544,550,568,584,598,630,638,640,726,730,734,736,758,760,766,840,854 %N A191146 Integers in (2+A191113)/3; contains A191113 as a proper subsequence. %C A191146 See A191113. %e A191146 A191113=(1,2,4,6,10,...), whence (2+A191113)/3=(1,4/2,2,8/3,4,...), so that, retaining only integers, A191146=(1,2,4,...). %t A191146 (See A191113.) %Y A191146 Cf. A191113, A191149. %K A191146 nonn %O A191146 1,2 %A A191146 _Clark Kimberling_, May 27 2011