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A287519 Positions of 0 in A287457; complement of A287186. 4
2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 43, 44, 45, 47, 48, 49, 51, 52, 53, 54, 55, 56, 58, 59, 60, 61, 62, 63, 65, 66, 67, 69, 70, 71, 73, 74, 75, 76, 77, 78, 80 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture:  a(n)/n  -> 1.20..., 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" -> "1000", "10" -> "000"}]

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

st = ToCharacterCode[w[23]] - 48   (* A287457 *)

Flatten[Position[st, 0]]  (* A287519 *)

Flatten[Position[st, 1]]  (* A287186 *)

CROSSREFS

Cf. A287457, A287186.

Sequence in context: A004745 A158037 A332109 * A307646 A246786 A095949

Adjacent sequences:  A287516 A287517 A287518 * A287520 A287521 A287522

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 17 2017

STATUS

approved

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Last modified January 23 03:15 EST 2022. Contains 350504 sequences. (Running on oeis4.)