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 A109275 #2 Mar 30 2012 17:26:17 %S A109275 12,42,46,60,66,72,82,102,106,108,126,150,162,166,172,178,180,190,192, %T A109275 222,226,240,262,268,276,282,292,312,346,348,358,372,388,396,408,420, %U A109275 432,448,456,460,462,466,486,502,508,520,522,540,568,570,586,612,630 %N A109275 Complement of A109274 and A109273. %Y A109275 Cf. A109273, A109274. %K A109275 nonn %O A109275 1,1 %A A109275 _Zak Seidov_, Jun 25 2005