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A288672 Positions of 1 in A288670; complement of A288671. 3
2, 3, 6, 7, 10, 15, 16, 19, 20, 23, 28, 33, 42, 43, 46, 47, 50, 51, 54, 59, 60, 63, 64, 67, 72, 77, 86, 87, 90, 95, 104, 105, 108, 113, 122, 123, 130, 131, 138, 139, 142, 143, 146, 147, 150, 155, 156, 159, 160, 163, 168, 169, 172, 173, 176, 181, 186, 195 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture:  a(n)/n->3.39..., and if m denotes this number, then -1 < m - a(n)/n) < 2 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, A288671.

Sequence in context: A333551 A093677 A343604 * A086495 A051733 A058632

Adjacent sequences:  A288669 A288670 A288671 * A288673 A288674 A288675

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 15 2017

STATUS

approved

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Last modified November 28 10:16 EST 2021. Contains 349401 sequences. (Running on oeis4.)