%I #8 Jun 04 2020 17:04:22
%S 3,4,7,8,9,10,13,14,17,18,19,20,23,24,27,28,31,32,35,36,37,38,41,42,
%T 45,46,47,48,51,52,55,56,57,58,61,62,65,66,67,68,71,72,75,76,79,80,83,
%U 84,85,86,89,90,93,94,95,96,99,100,103,104,107,108,111,112
%N Positions of 1 in A284487; complement of A284488.
%C Conjecture: a(n)/n -> (1 + sqrt(13))/2.
%H Clark Kimberling, <a href="/A284489/b284489.txt">Table of n, a(n) for n = 1..10000</a>
%t s = Nest[Flatten[# /. {0 -> {1}, 1 -> {0, 0, 1, 1}}] &, {0}, 14]; (* A284487 *)
%t Flatten[Position[s, 0]]; (* A284488 *)
%t Flatten[Position[s, 1]]; (* A284489 *)
%Y Cf. A284487, A284488, A284491.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 04 2017