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A288666 Positions of 0 in A288665; complement of A288667. 3
1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 16, 17, 20, 21, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 37, 38, 39, 40, 41, 42, 45, 46, 49, 50, 53, 54, 56, 57, 58, 59, 62, 63, 66, 67, 69, 70, 71, 72, 75, 76, 79, 80, 82, 83, 84, 85, 87, 88, 89, 90, 92, 93, 94, 95, 96 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture:  a(n)/n->1.41..., and if m denotes this number, then -1 < m - a(n)/n) < 1 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" -> "0110", "10" -> "000"}]

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

st = ToCharacterCode[w[9]] - 48   (* A288665 *)

Flatten[Position[st, 0]]  (* A288666 *)

Flatten[Position[st, 1]]  (* A288667 *)

CROSSREFS

Cf. A288665, A288667.

Sequence in context: A039076 A037471 A080401 * A180734 A031482 A047369

Adjacent sequences:  A288663 A288664 A288665 * A288667 A288668 A288669

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 15 2017

STATUS

approved

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Last modified January 20 19:53 EST 2020. Contains 331096 sequences. (Running on oeis4.)