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A286421 Positions of 1 in A286419; complement of A286420. 3
2, 3, 4, 5, 6, 9, 11, 12, 13, 14, 16, 17, 20, 21, 22, 23, 24, 27, 29, 30, 33, 34, 35, 36, 38, 39, 40, 41, 42, 45, 47, 48, 49, 50, 52, 53, 56, 57, 58, 59, 61, 62, 63, 64, 65, 68, 70, 71, 74, 75, 76, 77, 78, 81, 83, 84, 85, 86, 88, 89, 92, 93, 94, 95, 96, 99 (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 -> 3/2.

LINKS

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

EXAMPLE

As a word, A286419 = 011111001011110110011..., in which 1 is in positions 2,3,4,5,6,9,...

MATHEMATICA

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

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"0100" -> "1"}]

st = ToCharacterCode[w1] - 48  (* A286419 *)

Flatten[Position[st, 0]]  (* A286420 *)

Flatten[Position[st, 1]]  (* A286421 *)

CROSSREFS

Cf. A010060, A286419, A286420.

Sequence in context: A162228 A085714 A240093 * A116546 A108957 A080112

Adjacent sequences:  A286418 A286419 A286420 * A286422 A286423 A286424

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 09 2017

STATUS

approved

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Last modified January 25 03:49 EST 2020. Contains 331241 sequences. (Running on oeis4.)