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A285423 Positions of 1 in A285421; complement of A285422. 3
1, 2, 4, 5, 7, 8, 9, 10, 12, 13, 15, 16, 18, 19, 21, 22, 23, 24, 26, 27, 29, 30, 31, 32, 34, 35, 37, 38, 40, 41, 43, 44, 45, 46, 48, 49, 51, 52, 53, 54, 56, 57, 59, 60, 61, 62, 64, 65, 67, 68, 69, 70, 72, 73, 75, 76, 78, 79, 81, 82, 83, 84, 86, 87, 89, 90 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: -2 < n*r - a(n) < 2 for n>=1, where r = (1 + sqrt(3))2.

LINKS

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

EXAMPLE

As a word, A285421 = 110110111101..., in which 1 is in positions 1,2,4,5,7,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {0, 1, 1}}] &, {0}, 11] (* A285421 *)

Flatten[Position[s, 0]]  (* A285422 *)

Flatten[Position[s, 1]]  (* A285423 *)

CROSSREFS

Cf. A285419, A285421, A285422.

Sequence in context: A047498 A026367 A039069 * A173025 A203463 A223909

Adjacent sequences:  A285420 A285421 A285422 * A285424 A285425 A285426

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 28 2017

STATUS

approved

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Last modified September 26 05:07 EDT 2021. Contains 347664 sequences. (Running on oeis4.)