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A286692 Positions of 0 in A286691; complement of A286693. 3
1, 3, 4, 6, 9, 10, 12, 13, 15, 18, 19, 21, 22, 24, 25, 27, 30, 31, 33, 34, 36, 39, 40, 42, 43, 45, 46, 48, 51, 52, 54, 55, 57, 60, 61, 63, 64, 66, 69, 70, 72, 73, 75, 76, 78, 81, 82, 84, 85, 87, 90, 91, 93, 94, 96, 97, 99, 102, 103, 105, 106, 108, 111, 112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) - a(n-1) is in {1,2,3} for n>=2, and a(n)/n -> 4 - sqrt(8).

LINKS

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

EXAMPLE

As a word, A286691 = 0100101100100101100100100101100100..., in which 0 is in positions 1,3,4,6,9,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 0, 1}, 1 -> {0}}] &, {0}, 6] (* A171588 *)

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0" -> "010", "1"->"110"}]

st = ToCharacterCode[w1] - 48 ; (* A286691 *)

Flatten[Position[st, 0]];  (* A286692 *)

Flatten[Position[st, 1]];  (* A286693 *)

CROSSREFS

Cf. A171588, A286691, A286693.

Sequence in context: A080710 A115837 A102342 * A014419 A138670 A080336

Adjacent sequences:  A286689 A286690 A286691 * A286693 A286694 A286695

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 13 2017

STATUS

approved

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Last modified May 9 00:09 EDT 2021. Contains 343685 sequences. (Running on oeis4.)