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%I #4 Apr 30 2017 07:51:19
%S 7,8,9,17,18,19,27,28,29,37,38,39,47,48,49,57,58,59,61,62,63,65,66,67,
%T 69,70,71,73,74,75,77,78,79,81,82,83,91,92,93,101,102,103,111,112,113,
%U 121,122,123,131,132,133,141,142,143,151,152,153,155,156,157
%N Positions of 0 in A285467; complement of A285469.
%H Clark Kimberling, <a href="/A285468/b285468.txt">Table of n, a(n) for n = 1..10000</a>
%e As a word, A285467 = 11111100011..., in which 0 is in positions 7,8,9,17,...
%t s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {0, 0, 0, 1}}] &, {0}, 11] (* A285467 *)
%t Flatten[Position[s, 0]] (* A285468 *)
%t Flatten[Position[s, 1]] (* A285469 *)
%Y Cf. A285464, A285467, A285469.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 29 2017