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A287413 Positions of 1 in A287411. 5

%I

%S 2,4,9,10,15,17,20,24,25,28,33,35,38,42,43,47,49,54,56,58,63,65,69,70,

%T 73,78,80,82,87,89,92,96,97,101,103,108,110,112,117,119,123,124,127,

%U 132,134,137,139,144,145,150,152,155,159,160,164,166,171,172,177

%N Positions of 1 in A287411.

%C a(n) - a(n-1) is in {1, 2, 3, 4, 5} for n >= 1; also, 3n - a(n) is in {0, 1, 2} for n >= 1. The first 20 numbers 3n - a(n) are 1, 2, 0, 2, 0, 1, 1, 0, 2, 2, 0, 1, 1, 0, 2, 1, 2, 0, 1, 2, with 0 in positions given by A287414.

%H Clark Kimberling, <a href="/A287413/b287413.txt">Table of n, a(n) for n = 1..10000</a>

%t s = Nest[Flatten[# /. {0->{0, 1, 2}, 1->{1, 2, 0}, 2->{0, 2, 1}}] &, {0}, 9]; (*A287411*)

%t Flatten[Position[s, 0]]; (*A287412*)

%t Flatten[Position[s, 1]]; (*A287413*)

%t Flatten[Position[s, 2]]; (*A287414*)

%Y Cf. A287411, A287412, A287414.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, May 25 2017

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Last modified June 1 02:09 EDT 2020. Contains 334758 sequences. (Running on oeis4.)