%I #4 Apr 22 2017 23:04:44
%S 1,2,6,7,8,12,14,16,17,18,21,22,26,28,29,30,33,34,38,40,41,42,45,46,
%T 49,50,54,55,56,60,61,62,66,68,70,71,72,75,76,80,82,83,84,87,88,92,94,
%U 95,96,99,100,103,104,108,110,112,113,114,117,118,121,122,126
%N Positions of 0 in A285159; complement of A285161.
%C Conjecture: a(n)/n -> 2.
%H Clark Kimberling, <a href="/A285160/b285160.txt">Table of n, a(n) for n = 1..10000</a>
%e As a word, A285142 = 001110..., in which 0 is in positions 1,2,6,7,8,...
%t s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 0, 1, 1}}] &, {0}, 10]; (* A285159 *)
%t Flatten[Position[s, 0]]; (* A285160 *)
%t Flatten[Position[s, 1]]; (* A285161 *)
%Y Cf. A285159, A285161, A285162.
%K nonn,easy
%O 1,2
%A _Clark Kimberling_, Apr 21 2017