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A286924 Positions of 1 in A286922; complement of A286923. 3
1, 2, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20, 22, 23, 24, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 39, 40, 41, 42, 44, 45, 46, 48, 49, 50, 52, 53, 54, 55, 57, 58, 59, 61, 62, 63, 64, 66, 67, 68, 70, 71, 72, 73, 75, 76, 77, 79, 80, 81, 83, 84, 85 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) - a(n-1) is in {1,2} for n>=2, and a(n)/n -> 2 - sqrt(1/22).

LINKS

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

EXAMPLE

As a word, A286922 = 1101110111101110111101110..., in which 1 is in positions 1,2,4,5,6,8....

MATHEMATICA

s = Nest[Flatten[# /. {0 -> 1, 1 -> {1, 1, 0}}] &, {1}, 7] (* A080764 *)

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0" -> "01"}]

st = ToCharacterCode[w1] - 48 ; (* A286922 *)

Flatten[Position[st, 0]];  (* A286923 *)

Flatten[Position[st, 1]];  (* A286924 *)

CROSSREFS

Cf. A080764, A286922, A286923.

Sequence in context: A285670 A030124 A064318 * A039100 A184482 A141204

Adjacent sequences:  A286921 A286922 A286923 * A286925 A286926 A286927

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 17 2017

STATUS

approved

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Last modified June 19 11:31 EDT 2019. Contains 324219 sequences. (Running on oeis4.)