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A285564 Positions of 0 in A286939; complement of A285564. 3
3, 9, 12, 19, 25, 28, 31, 37, 40, 47, 53, 59, 62, 69, 75, 78, 81, 87, 90, 97, 100, 107, 113, 116, 119, 125, 128, 135, 141, 147, 150, 157, 163, 166, 169, 175, 181, 184, 187, 193, 196, 203, 209, 215, 218, 225, 231, 234, 237, 243, 246, 253, 256, 263, 269, 272 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture : lim a(n)/n)) = 4.89... , and if m denotes this number, then -1 < a(n)/n - m < 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" -> "000"}]

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

st = ToCharacterCode[w[11]] - 48   (* A286939 *)

Flatten[Position[st, 0]]  (* A285432 *)

Flatten[Position[st, 1]]  (* A285564 *)

Table[StringLength[w[n]], {n, 1, 35}] (* A285665 conjectured *)

CROSSREFS

Cf. A286939, A285432, A285665.

Sequence in context: A261953 A297001 A309394 * A140979 A096726 A272027

Adjacent sequences:  A285561 A285562 A285563 * A285565 A285566 A285567

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 04 2017

STATUS

approved

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Last modified February 21 02:02 EST 2020. Contains 332086 sequences. (Running on oeis4.)