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A288671 Positions of 0 in A288670; complement of A288672. 3
1, 4, 5, 8, 9, 11, 12, 13, 14, 17, 18, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 44, 45, 48, 49, 52, 53, 55, 56, 57, 58, 61, 62, 65, 66, 68, 69, 70, 71, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85, 88, 89, 91, 92, 93, 94, 96 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjecture:  a(n)/n->1.41..., 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" -> "0110", "10" -> "000"}]

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

st = ToCharacterCode[w[13]] - 48   (* A288670 *)

Flatten[Position[st, 0]]  (* A288671 *)

Flatten[Position[st, 1]]  (* A288672 *)

CROSSREFS

Cf. A288670, A288672.

Sequence in context: A295150 A042956 A128217 * A284906 A285260 A190671

Adjacent sequences:  A288668 A288669 A288670 * A288672 A288673 A288674

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 15 2017

STATUS

approved

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Last modified December 3 02:46 EST 2021. Contains 349445 sequences. (Running on oeis4.)