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 A188013 #4 Mar 30 2012 18:57:22 %S A188013 1,2,4,5,6,7,9,10,11,12,13,14,15,17,18,19,20,22,23,24,25,26,27,28,30, %T A188013 31,32,33,34,35,36,38,39,40,41,43,44,45,46,47,48,49,51,52,53,54,56,57, %U A188013 58,59,60,61,62,64,65,66,67,68,69,70,72,73,74,75,77,78,79,80,81,82,83,85,86,87,88,89,90,91,93,94,95,96,98,99,100,101,102,103,104,106,107,108 %N A188013 Positions of 1 in A188011; complement of A188012. %C A188013 See A188014, A188011. %t A188013 (See A188011.) %Y A188013 Cf. A188014, A188011, A188012. %K A188013 nonn %O A188013 1,2 %A A188013 _Clark Kimberling_, Mar 19 2011