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 A188259 #4 Mar 30 2012 18:57:22 %S A188259 3,4,7,8,11,12,15,16,20,21,24,25,28,29,32,33,37,38,41,42,45,46,49,50, %T A188259 54,55,58,59,62,63,66,67,71,72,75,76,79,80,83,84,87,88,92,93,96,97, %U A188259 100,101,104,105,109,110,113,114,117,118,121,122,126,127,130,131,134,135,138,139,143,144,147,148,151,152,155,156,159,160 %N A188259 Positions of 1 in A188257; complement of A188258. %C A188259 See A187950. %t A188259 (See A188257.) %Y A188259 Cf. A187950, A188257, A188258. %K A188259 nonn %O A188259 1,1 %A A188259 _Clark Kimberling_, Mar 25 2011