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A287449 Positions of 1 in A287447. 4
2, 6, 7, 10, 14, 18, 21, 23, 25, 30, 32, 34, 38, 42, 43, 46, 50, 54, 55, 59, 63, 65, 69, 70, 75, 77, 79, 82, 86, 90, 92, 96, 97, 102, 104, 106, 110, 114, 115, 118, 122, 126, 129, 131, 133, 138, 140, 142, 146, 150, 151, 154, 158, 162, 165, 167, 169, 173, 177 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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, 0, 2, 2, 1, 0, 0, 1, 2, 0, 1, 2, 1, 0, 2, 2, 1, 0, 2, 1, with 0 in positions given by A287449, 1 in positions given by A189724, and 2 in positions given by A287450.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

s = Nest[Flatten[# /. {0->{0, 1, 2}, 1->{2, 0, 1}, 2->{1, 0, 2}}] &, {0}, 9]; (*A287447*)

Flatten[Position[s, 0]]; (*A189724*)

Flatten[Position[s, 1]]; (*A287449*)

Flatten[Position[s, 2]]; (*A287450*)

CROSSREFS

Cf. A287447, A189724, A287450.

Sequence in context: A029507 A047552 A287453 * A287688 A221847 A283766

Adjacent sequences:  A287446 A287447 A287448 * A287450 A287451 A287452

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 30 2017

STATUS

approved

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Last modified February 23 12:03 EST 2019. Contains 320431 sequences. (Running on oeis4.)