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A288601 Positions of 0 in A288600; complement of A288602. 3
1, 3, 4, 6, 8, 9, 12, 13, 15, 18, 19, 21, 23, 24, 28, 29, 31, 33, 34, 37, 38, 40, 44, 45, 47, 49, 50, 53, 54, 56, 59, 60, 62, 64, 65, 70, 71, 73, 75, 76, 79, 80, 82, 85, 86, 88, 90, 91, 95, 96, 98, 100, 101, 104, 105, 107, 112, 113, 115, 117, 118, 121, 122 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture:  a(n)/n->2, and -1 < 2 - 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" -> "0101", "1" -> "1001"}]

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

st = ToCharacterCode[w[11]] - 48   (* A288600 *)

Flatten[Position[st, 0]]  (* A288601 *)

Flatten[Position[st, 1]]  (* A288602 *)

CROSSREFS

Cf. A288601, A288602.

Sequence in context: A024324 A255773 A195019 * A192519 A036446 A284469

Adjacent sequences:  A288598 A288599 A288600 * A288602 A288603 A288604

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 14 2017

STATUS

approved

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Last modified November 27 20:49 EST 2021. Contains 349395 sequences. (Running on oeis4.)