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A287269 Positions of 1 in A287267. 4
1, 2, 4, 5, 11, 12, 14, 15, 25, 26, 31, 32, 33, 34, 36, 37, 43, 44, 46, 47, 57, 58, 63, 64, 69, 70, 75, 76, 77, 78, 80, 81, 87, 88, 93, 94, 95, 96, 98, 99, 101, 102, 104, 105, 111, 112, 114, 115, 125, 126, 131, 132, 133, 134, 136, 137, 143, 144, 146, 147 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..60.

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {0, 2}, 2 -> 0}] &, {0}, 11] (* A287267 *)

Flatten[Position[s, 0]] (* A287268 *)

Flatten[Position[s, 1]] (* A287269 *)

Flatten[Position[s, 2]] (* A287270 *)

CROSSREFS

Cf. A287267, A287268, A287270.

Sequence in context: A177244 A296346 A089409 * A136988 A074725 A292412

Adjacent sequences:  A287266 A287267 A287268 * A287270 A287271 A287272

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 24 2017

STATUS

approved

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Last modified September 15 08:13 EDT 2019. Contains 327062 sequences. (Running on oeis4.)