# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a284913 Showing 1-1 of 1 %I A284913 #6 Apr 18 2017 15:24:19 %S A284913 1,4,6,8,10,11,14,16,17,20,22,23,26,28,29,31,34,36,38,40,41,44,46,47, %T A284913 49,52,54,56,58,59,62,64,65,67,70,72,74,76,77,80,82,83,85,88,90,91,94, %U A284913 96,98,100,101,104,106,107,110,112,113,116,118,119,121,124 %N A284913 Positions of 0 in A284912; complement of A284914. %C A284913 2n - a(n) is in {0,1} for n >= 1. %H A284913 Clark Kimberling, Table of n, a(n) for n = 1..10000 %e A284913 As a word, A284912 = 011010101..., in which 0 is in positions 1,4,6,8,... %t A284913 s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0, 1, 0}}] &, {0}, 6] (* A284912 *) %t A284913 Flatten[Position[s, 0]] (* A284913 *) %t A284913 Flatten[Position[s, 1]] (* A284914 *) %Y A284913 Cf. A284912, A284914. %K A284913 nonn,easy %O A284913 1,2 %A A284913 _Clark Kimberling_, Apr 17 2017 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE