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A284684 Positions of 0 in A284627; complement of A284685. 3
1, 4, 7, 8, 10, 13, 15, 16, 18, 22, 25, 26, 28, 32, 34, 35, 37, 40, 43, 44, 46, 49, 51, 52, 54, 58, 60, 61, 63, 66, 69, 70, 72, 76, 79, 80, 82, 85, 87, 88, 90, 94, 97, 98, 100, 104, 106, 107, 109, 112, 115, 116, 118, 122, 125, 126, 128, 131, 133, 134, 136 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) - a(n-1) is in {1,2,3,4} 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, A284627 = 0110110010110100101110..., in which 0 is in positions 1,4,7,8,10,...

MATHEMATICA

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

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0011" -> "1"}]

st = ToCharacterCode[w1] - 48  (* A284627 *)

Flatten[Position[st, 0]]  (* A284684 *)

Flatten[Position[st, 1]]  (* A284685 *)

CROSSREFS

Cf. A010060, A284627, A284685.

Sequence in context: A174142 A091158 A175553 * A175008 A286401 A084791

Adjacent sequences:  A284681 A284682 A284683 * A284685 A284686 A284687

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 10 2017

STATUS

approved

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Last modified February 26 20:23 EST 2020. Contains 332295 sequences. (Running on oeis4.)