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A288740 Positions of 1 in A288736; complement of A288737. 3
2, 3, 8, 9, 11, 12, 14, 15, 20, 21, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 44, 45, 50, 51, 53, 54, 56, 57, 62, 63, 68, 69, 71, 72, 74, 75, 77, 78, 80, 81, 83, 84, 86, 87, 92, 93, 98, 99, 101, 102, 104, 105, 110, 111, 116, 117, 119, 120, 122, 123, 125, 126 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture:  a(n)/n -> 2, and  -2/3 < 2 - a(n)/n) < 1/2 for n >= 1.

LINKS

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

MATHEMATICA

s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];

w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "01"}]

Table[w[n], {n, 0, 8}]

st = ToCharacterCode[w[22]] - 48   (* A288736 *)

Flatten[Position[st, 0]]  (* A288737 *)

Flatten[Position[st, 1]]  (* A288740 *)

CROSSREFS

Cf. A288736, A288737.

Sequence in context: A272830 A028821 A337261 * A290150 A237037 A283618

Adjacent sequences:  A288737 A288738 A288739 * A288741 A288742 A288743

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 16 2017

STATUS

approved

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Last modified April 18 19:31 EDT 2021. Contains 343089 sequences. (Running on oeis4.)