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 A187968 #4 Mar 30 2012 18:57:22 %S A187968 1,2,3,4,6,7,8,9,11,12,13,14,15,16,18,19,20,21,23,24,25,26,27,28,30, %T A187968 31,32,33,35,36,37,38,40,41,42,43,44,45,47,48,49,50,52,53,54,55,56,57, %U A187968 59,60,61,62,64,65,66,67,69,70,71,72,73,74,76,77,78,79,81,82,83,84,85,86,88,89,90,91,93,94,95,96,97,98,100,101,102,103,105,106,107,108 %N A187968 Positions of 1 in A187967; complement (conjectured) of A098021. %C A187968 See A187950. %t A187968 (See A187967.) %Y A187968 Cf. A187950, A187967, A098021. %K A187968 nonn %O A187968 1,2 %A A187968 _Clark Kimberling_, Mar 17 2011