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%I #4 Apr 20 2017 09:24:10
%S 5,11,17,23,25,27,29,31,37,43,49,55,61,63,65,67,69,75,81,87,93,99,101,
%T 103,105,107,113,119,125,131,137,139,141,143,145,151,153,155,157,159,
%U 165,167,169,171,173,179,181,183,185,187,193,195,197,199,201,207
%N Positions of 1 in A285125; complement of A285126.
%C Conjecture: -3 < n*r - a(n) < 0 for n>=1, where r = 3.5621...
%H Clark Kimberling, <a href="/A285127/b285127.txt">Table of n, a(n) for n = 1..10000</a>
%e As a word, A285125 = 000010000010..., in which 1 is in positions 4,11,17,...
%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, A285126.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 19 2017
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