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 A188258 #4 Mar 30 2012 18:57:22 %S A188258 1,2,5,6,9,10,13,14,17,18,19,22,23,26,27,30,31,34,35,36,39,40,43,44, %T A188258 47,48,51,52,53,56,57,60,61,64,65,68,69,70,73,74,77,78,81,82,85,86,89, %U A188258 90,91,94,95,98,99,102,103,106,107,108,111,112,115,116,119,120,123,124,125,128,129,132,133,136,137,140,141,142,145,146,149,150,153 %N A188258 Positions of 0 in A188257; complement of A188259. %C A188258 See A187950, A188257. %t A188258 (See A188257.) %Y A188258 Cf. A187950, A188257, A188259. %K A188258 nonn %O A188258 1,2 %A A188258 _Clark Kimberling_, Mar 25 2011