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A286492 Positions of 1 in A286490; complement of A286491. 3
2, 3, 5, 8, 9, 12, 14, 17, 20, 21, 23, 26, 27, 30, 33, 34, 36, 39, 41, 44, 45, 48, 50, 53, 56, 57, 59, 62, 64, 67, 68, 71, 74, 75, 77, 80, 81, 84, 86, 89, 92, 93, 95, 98, 99, 102, 105, 106, 108, 111, 113, 116, 117, 120, 123, 124, 126, 129, 130, 133, 135, 138 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3} for n>=2.  Conjecture: a(n)/n -> 9/4.

LINKS

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

EXAMPLE

As a word, A286490 = 011010011001010010011..., in which 1 is in positions 2,3,5,8,9,12,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0101" -> "0"}]

st = ToCharacterCode[w1] - 48  (* A286490 *)

Flatten[Position[st, 0]]  (* A286491 *)

Flatten[Position[st, 1]]  (* A286492 *)

CROSSREFS

Cf. A010060, A286490, A286491.

Sequence in context: A153081 A190841 A095952 * A025033 A122933 A091513

Adjacent sequences:  A286489 A286490 A286491 * A286493 A286494 A286495

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 11 2017

STATUS

approved

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Last modified June 2 07:15 EDT 2020. Contains 334767 sequences. (Running on oeis4.)