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A285141 Positions of 1 in A285139; complement of A285140. 3
3, 5, 9, 11, 13, 15, 19, 21, 25, 27, 29, 31, 35, 37, 41, 43, 47, 49, 53, 55, 57, 59, 63, 65, 69, 71, 73, 75, 79, 81, 85, 87, 89, 91, 95, 97, 101, 103, 105, 107, 111, 113, 117, 119, 123, 125, 129, 131, 133, 135, 139, 141, 145, 147, 149, 151, 155, 157, 161 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

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

EXAMPLE

As a word, A285139 = 001010..., in which 1 is in positions 3,5,9,11,,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 0, 1, 0}}] &, {0}, 12]; (* A285139 *)

Flatten[Position[s, 0]];  (* A285140 *)

Flatten[Position[s, 1]];  (* A285141 *)

CROSSREFS

Cf. A285139, A285140, A285142.

Sequence in context: A162699 A325129 A173263 * A329095 A319009 A294427

Adjacent sequences:  A285138 A285139 A285140 * A285142 A285143 A285144

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Apr 20 2017

STATUS

approved

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Last modified April 20 15:08 EDT 2021. Contains 343135 sequences. (Running on oeis4.)