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%I #4 Apr 20 2017 09:24:40
%S 2,4,6,8,9,10,11,12,14,16,18,20,22,23,24,25,26,28,30,32,34,36,37,38,
%T 39,40,42,44,46,48,50,51,52,53,54,56,57,58,59,60,62,63,64,65,66,68,69,
%U 70,71,72,74,75,76,77,78,80,82,84,86,88,89,90,91,92,94,96
%N Positions of 0 in A285128; complement of A285130.
%C Conjecture: -1 < n*r - a(n) < 1 for n>=1, where r = 1.3903...
%H Clark Kimberling, <a href="/A285129/b285129.txt">Table of n, a(n) for n = 1..10000</a>
%e As a word, A285128 = 10101010000010..., in which 0 is in positions 2,4,6,8,9,...
%t s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 0, 0, 0}}] &, {0}, 14]; (* A285125 *)
%t Flatten[Position[s, 0]]; (* A285126 *)
%t Flatten[Position[s, 1]]; (* A285127 *)
%Y Cf. A285125, A285128, A285130.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 19 2017
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