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A287445 Positions of 1 in A287443. 5

%I

%S 2,6,9,12,14,18,20,24,27,29,33,36,38,42,45,48,50,54,56,60,63,65,69,72,

%T 75,77,81,83,87,90,92,96,99,102,104,108,110,114,117,120,122,126,128,

%U 132,135,137,141,144,146,150,153,156,158,162,164,168,171,174,176

%N Positions of 1 in A287443.

%C a(n) - a(n-1) is in {2, 3, 4} for n >= 1; also, 3n - a(n) is in {0, 1} for n >= 1. The first 20 numbers 3n - a(n) are 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, with 1 in positions given by A287444.

%H Clark Kimberling, <a href="/A287445/b287445.txt">Table of n, a(n) for n = 1..10000</a>

%t s = Nest[Flatten[# /. {0->{0, 1, 2}, 1->{2, 0, 1}, 2->{0, 2, 1}}] &, {0}, 9]; (*A287443*)

%t Flatten[Position[s, 0]]; (*A287444*)

%t Flatten[Position[s, 1]]; (*A287445*)

%t Flatten[Position[s, 2]]; (*A287446*)

%Y Cf. A287443, A287444, A287446.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, May 26 2017

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Last modified August 24 03:51 EDT 2019. Contains 326260 sequences. (Running on oeis4.)