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%I #4 Apr 09 2017 22:34:45
%S 1,3,4,7,8,10,12,13,15,17,18,21,22,24,25,27,28,31,32,34,36,37,40,41,
%T 43,45,46,49,50,52,53,55,56,59,60,62,64,65,67,69,70,73,74,76,78,79,81,
%U 83,84,87,88,90,91,93,94,97,98,100,102,103,105,107,108,111
%N Positions of 1 in A284656; complement of A284657.
%C Conjecture: -1 < n*sqrt(3) - a(n) < 2 for n >= 1.
%H Clark Kimberling, <a href="/A284658/b284658.txt">Table of n, a(n) for n = 1..10000</a>
%t s = Nest[Flatten[# /. {0 -> {1}, 1 -> {0, 1, 1, 0}}] &, {0}, 7] (* A284656 *)
%t Flatten[Position[s, 0]] (* A284657 *)
%t Flatten[Position[s, 1]] (* A284658 *)
%Y Cf. A284654, A284656, A284657.
%K nonn,easy
%O 1,2
%A _Clark Kimberling_, Apr 08 2017
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