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 A187573 #4 Mar 30 2012 18:57:19 %S A187573 5,9,13,17,24,28,32,39,43,47,54,58,62,69,73,77,81,85,89,96,100,104, %T A187573 111,115,119,126,130,134,138,142,146,153,157,161,168,172,176,183,187, %U A187573 191,195,199,203,210,214,218,225,229,233,240,244,248,252,256,260,267,271,275,282,286,290,297,301,305,312,316,320 %N A187573 Complement of A187572. %C A187573 See. A187224, A187572. %t A187573 (See A187572.) %Y A187573 Cf. A187224, A187572. %K A187573 nonn %O A187573 1,1 %A A187573 _Clark Kimberling_, Mar 11 2011