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A286401 Positions of 0 in A286400; complement of A286402. 3
1, 4, 7, 8, 10, 13, 15, 18, 19, 22, 25, 26, 28, 31, 32, 35, 37, 40, 43, 44, 46, 49, 51, 54, 55, 58, 60, 63, 66, 67, 69, 72, 73, 76, 79, 80, 82, 85, 87, 90, 91, 94, 97, 98, 100, 103, 104, 107, 109, 112, 115, 116, 118, 121, 122, 125, 128, 129, 131, 134, 136 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) - a(n-1) is in {1,2,3} for n>=2.  Conjecture: a(n)/n -> 9/4.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

EXAMPLE

As a word, A286400 = 011011001011010110011..., in which 0 is in positions 1,4,7,8,10,13,...

MATHEMATICA

s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)

w = StringJoin[Map[ToString, s]]

w1 = StringReplace[w, {"1010" -> "1"}]

st = ToCharacterCode[w1] - 48  (* A286400 *)

Flatten[Position[st, 0]]  (* A286401 *)

Flatten[Position[st, 1]]  (* A286402 *)

CROSSREFS

Cf. A010060, A286400, A286402.

Sequence in context: A175553 A284684 A175008 * A084791 A310933 A186712

Adjacent sequences:  A286398 A286399 A286400 * A286402 A286403 A286404

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 09 2017

STATUS

approved

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Last modified March 30 12:10 EDT 2020. Contains 333125 sequences. (Running on oeis4.)