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 A187688 #4 Mar 30 2012 18:57:19 %S A187688 2,4,6,8,10,13,14,17,19,21,23,25,27,30,32,33,36,38,40,42,44,47,49,51, %T A187688 53,55,57,59,61,64,66,68,70,72,74,76,78,81,83,85,87,89,91,93,95,98, %U A187688 100,102,104,106,109,110,112,115,117,119,121,123,126,128,129,132,134,136,138,140,142,144,147,149,151,153,155,157,160,162,164,166,168,170 %N A187688 Complement of A187687. %C A187688 See A187224. %t A187688 (See A187687.) %Y A187688 Cf. A187224, A187687. %K A187688 nonn %O A187688 1,1 %A A187688 _Clark Kimberling_, Mar 12 2011