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%I #8 May 25 2017 05:28:05
%S 1,3,11,13,29,31,35,37,47,49,53,55,57,59,67,69,85,87,91,93,103,105,
%T 109,111,121,123,127,129,139,141,145,147,151,153,157,159,161,163,171,
%U 173,183,185,189,191,193,195,203,205,221,223,227,229,239,241,245,247
%N Positions of 2 in A287345.
%H Clark Kimberling, <a href="/A287348/b287348.txt">Table of n, a(n) for n = 1..10000</a>
%t s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {2, 0}, 2 -> 0}] &, {0}, 11] (* A287345 *)
%t Flatten[Position[s, 0]] (* A287346 *)
%t Flatten[Position[s, 1]] (* A287347 *)
%t Flatten[Position[s, 2]] (* A287348 *)
%Y Cf. A287345, A287346, A287347.
%K nonn,easy
%O 1,2
%A _Clark Kimberling_, May 24 2017
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