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A288217 Positions of 0 in A288216; complement of A288218. 3
1, 2, 4, 5, 7, 9, 10, 11, 13, 14, 15, 16, 18, 19, 21, 23, 24, 25, 26, 27, 29, 31, 32, 33, 34, 36, 37, 38, 40, 41, 43, 45, 46, 47, 49, 50, 51, 52, 54, 55, 56, 58, 59, 61, 63, 64, 65, 66, 68, 70, 71, 72, 73, 74, 76, 77, 79, 81, 82, 83, 84, 85, 87, 89, 90, 91 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture: a(n)/n -> 1.38..., 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" -> "010"}]

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

st = ToCharacterCode[w[21]] - 48   (* A288216 *)

Flatten[Position[st, 0]]  (* A288217 *)

Flatten[Position[st, 1]]  (* A288218 *)

CROSSREFS

Cf. A288216, A288218.

Sequence in context: A140204 A084577 A202129 * A026457 A185598 A185550

Adjacent sequences:  A288214 A288215 A288216 * A288218 A288219 A288220

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 18 2017

STATUS

approved

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)