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A287452 Positions of 0 in A287451. 6
1, 5, 9, 12, 13, 17, 20, 24, 25, 29, 33, 34, 37, 41, 45, 48, 49, 53, 57, 58, 62, 65, 69, 70, 73, 77, 81, 84, 85, 89, 92, 96, 97, 100, 104, 108, 109, 113, 117, 120, 121, 125, 128, 132, 133, 137, 141, 142, 145, 149, 153, 156, 157, 161, 164, 168, 169, 172, 176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) - a(n-1) is in {1, 3, 4} for n >= 1; also, 3n - a(n) is in {0, 1, 2} for n >= 1.  The first 20 numbers 3n - a(n) are 2, 1, 0, 0, 2, 1, 1, 0, 2, 1, 0, 2, 2, 1, 0, 0, 2, 1, 0, 2, with 0 in positions given by A287454, 1 in positions given by A287453, and 2 in positions given by A287452.

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, 2, 0}}] &, {0}, 9]; (*A287451*)

Flatten[Position[s, 0]]; (*A287452*)

Flatten[Position[s, 1]]; (*A287453*)

Flatten[Position[s, 2]]; (*A287454*)

CROSSREFS

Cf. A287451, A287453, A287454.

Sequence in context: A062217 A190691 A135979 * A287456 A123574 A143834

Adjacent sequences:  A287449 A287450 A287451 * A287453 A287454 A287455

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 30 2017

STATUS

approved

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Last modified October 18 10:28 EDT 2017. Contains 293507 sequences.