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 A187350 #5 Mar 30 2012 18:57:19 %S A187350 2,4,6,8,10,12,14,16,18,21,22,25,26,29,31,33,35,37,39,41,43,45,47,50, %T A187350 52,53,55,58,60,62,64,66,68,70,72,74,76,79,81,83,84,86,89,91,93,95,97, %U A187350 99,101,103,105,108,110,112,114,115,118,120,122,124,126,128,130,132 %N A187350 Complement of A187349. %C A187350 See A187224. %t A187350 (See A187349.) %Y A187350 Cf. A187224, A187349. %K A187350 nonn %O A187350 1,1 %A A187350 _Clark Kimberling_, Mar 08 2011