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 A187947 #4 Mar 30 2012 18:57:21 %S A187947 1,2,3,4,5,6,7,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27, %T A187947 28,30,31,32,33,34,35,36,37,38,39,40,41,43,44,45,46,47,48,49,50,51,52, %U A187947 53,54,56,57,58,59,60,61,62,64,65,66,67,68,69,70,71,72,73,74,75,77,78,79,80,81,82,83,85,86,87,88,89,90,91,92,93,94,95,96,98,99,100 %N A187947 Positions of 0 in A187946; complement of A134862. %C A187947 See A187950. %t A187947 (See A187946.) %Y A187947 Cf. A187950, A187946, A134862. %K A187947 nonn %O A187947 1,2 %A A187947 _Clark Kimberling_, Mar 16 2011