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A287339 Positions of 1 in A287268. 4
2, 3, 5, 6, 7, 8, 13, 14, 20, 21, 23, 24, 25, 26, 31, 32, 37, 38, 43, 44, 54, 55, 57, 58, 64, 65, 67, 68, 69, 70, 75, 76, 86, 87, 89, 90, 96, 97, 99, 100, 102, 103, 105, 106, 107, 108, 113, 114, 120, 121, 123, 124, 125, 126, 131, 132, 137, 138, 143, 144, 154 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {2, 0}, 2 -> 0}] &, {0}, 12] (* A287337 *)

Flatten[Position[s, 0]] (* A287338 *)

Flatten[Position[s, 1]] (* A287339 *)

Flatten[Position[s, 2]] (* A287340 *)

CROSSREFS

Cf. A287337, A287338, A287340.

Sequence in context: A104452 A062877 A068526 * A039086 A280060 A197433

Adjacent sequences:  A287336 A287337 A287338 * A287340 A287341 A287342

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 24 2017

STATUS

approved

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Last modified January 27 17:58 EST 2020. Contains 331296 sequences. (Running on oeis4.)