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A287126 Positions of 0 in A287125; complement of A287127. 3
1, 2, 6, 9, 12, 13, 16, 19, 20, 23, 26, 27, 28, 32, 35, 36, 39, 42, 43, 44, 48, 51, 52, 55, 58, 59, 60, 62, 65, 68, 71, 72, 75, 78, 79, 80, 84, 87, 88, 91, 94, 95, 96, 98, 101, 104, 107, 108, 111, 114, 115, 116, 120, 123, 124, 127, 130, 131, 132, 134, 137 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: a(n)/n-> 2.22..., and if m denotes this number, then -2 < m - a(n)/n < 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" -> "001", "1" -> "110"}]

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

st = ToCharacterCode[w[11]] - 48   (* A287125 *)

Flatten[Position[st, 0]]  (* A287126 *)

Flatten[Position[st, 1]]  (* A287127 *)

Table[StringLength[w[n]], {n, 1, 35}] (* A287128 conjectured *)

CROSSREFS

Cf. A287125, A287127, A287128.

Sequence in context: A257475 A086939 A174682 * A270095 A153043 A171504

Adjacent sequences:  A287123 A287124 A287125 * A287127 A287128 A287129

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 06 2017

STATUS

approved

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Last modified September 20 20:12 EDT 2019. Contains 327247 sequences. (Running on oeis4.)