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 A186543 #5 Mar 30 2012 18:57:19 %S A186543 2,4,7,8,12,13,15,18,21,22,25,26,29,31,34,36,38,41,43,45,47,50,51,54, %T A186543 56,59,61,63,66,68,70,73,74,77,79,81,83,86,88,90,92,95,97,99,102,104, %U A186543 107,108,111,113,116,118,120,122,125,127,129,131,133,135,138,140,142,145,147,149,151,154,156,158,160,163,165,168,170,172,174,176,179 %N A186543 Complement of A179185. %t A186543 (See A179185.) %Y A186543 Cf. A187224, A179185. %K A186543 nonn %O A186543 1,1 %A A186543 _Clark Kimberling_, Mar 09 2011