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A288225 Positions of 1 in A288223; complement of A288224. 3
2, 4, 10, 12, 17, 21, 24, 26, 32, 35, 37, 41, 46, 48, 53, 57, 60, 62, 67, 69, 75, 79, 82, 84, 88, 93, 96, 98, 104, 106, 111, 115, 118, 120, 126, 129, 131, 135, 140, 143, 145, 151, 153, 158, 162, 165, 167, 171, 176, 180, 183, 185, 190, 192, 198, 200, 205, 209 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture: a(n)/n -> 3.61..., 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[20]] - 48   (* A288223 *)

Flatten[Position[st, 0]]  (* A288224 *)

Flatten[Position[st, 1]]  (* A288225 *)

CROSSREFS

Cf. A288223, A288224.

Sequence in context: A113536 A081887 A085344 * A047463 A107059 A160716

Adjacent sequences:  A288222 A288223 A288224 * A288226 A288227 A288228

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 22 2017

STATUS

approved

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Last modified July 24 06:53 EDT 2021. Contains 346273 sequences. (Running on oeis4.)