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 A187481 #5 Mar 30 2012 18:57:19 %S A187481 3,7,12,14,18,23,25,29,31,36,41,45,47,52,56,58,62,67,72,74,78,83,88, %T A187481 90,94,96,101,105,107,111,116,118,122,127,132,134,138,140,145,149,151, %U A187481 156,161,165,167,172,176,178,182,187,189,193,195,200,205,209,211,216,220,222,226,231,233,237,239,244,249,253,255,260,265,269,271 %N A187481 Complement of A187480. %C A187481 See A187224 and A187480. %t A187481 (See A187480.) %Y A187481 Cf. A187224, A187480. %K A187481 nonn %O A187481 1,1 %A A187481 _Clark Kimberling_, Mar 10 2011