%I
%S 2,3,5,7,9,12,13,15,18,19,21,24,25,27,30,32,33,35,37,39,42,43,45,48,
%T 50,51,53,55,57,60,61,63,66,68,69,71,73,75,78,79,81,84,86,87,89,92,93,
%U 95,97,99,102,103,105,108,109,111,114,115,117,120,122,123,125
%N Positions of 1 in A284912; complement of A284913.
%C 2n  a(n) is in {0,1} for n >= 1.
%H Clark Kimberling, <a href="/A284914/b284914.txt">Table of n, a(n) for n = 1..10000</a>
%e As a word, A284912 = 011010101..., in which 1 is in positions 2,3,5,7,9,...
%t s = Nest[Flatten[# /. {0 > {0, 1}, 1 > {1, 0, 1, 0}}] &, {0}, 6] (* A284912 *)
%t Flatten[Position[s, 0]] (* A284913 *)
%t Flatten[Position[s, 1]] (* A284914 *)
%Y Cf. A284912, A284913.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 17 2017
