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A288214 Positions of 0 in A288213; complement of A288215. 3
1, 2, 4, 5, 8, 9, 11, 12, 15, 18, 19, 21, 22, 25, 26, 28, 29, 32, 35, 36, 39, 42, 43, 45, 46, 49, 50, 52, 53, 56, 59, 60, 62, 63, 66, 67, 69, 70, 73, 76, 77, 80, 83, 84, 86, 87, 90, 93, 94, 97, 100, 101, 103, 104, 107, 108, 110, 111, 114, 117, 118, 120, 121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

0 < 2 - 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" -> "0010", "1" -> "010"}]

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

st = ToCharacterCode[w[11]] - 48   (* A288213 *)

Flatten[Position[st, 0]]  (* A288214 *)

Flatten[Position[st, 1]]  (* A288215 *)

CROSSREFS

Cf. A288213, A288215.

Sequence in context: A027883 A201818 A047380 * A117121 A101925 A101884

Adjacent sequences:  A288211 A288212 A288213 * A288215 A288216 A288217

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 07 2017

STATUS

approved

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Last modified May 13 08:08 EDT 2021. Contains 343836 sequences. (Running on oeis4.)