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A286420 Positions of 0 in A286419; complement of A286421. 3
1, 7, 8, 10, 15, 18, 19, 25, 26, 28, 31, 32, 37, 43, 44, 46, 51, 54, 55, 60, 66, 67, 69, 72, 73, 79, 80, 82, 87, 90, 91, 97, 98, 100, 103, 104, 109, 115, 116, 118, 121, 122, 128, 129, 131, 136, 139, 140, 145, 151, 152, 154, 159, 162, 163, 169, 170, 172, 175 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(n) - a(n-1) is in {1,2,3,5,6} for n>=2. Conjecture: a(n)/n -> 3.
LINKS
EXAMPLE
As a word, A286419 = 011111001011110110011..., in which 0 is in positions 1,7,8,10,15,...
MATHEMATICA
s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)
w = StringJoin[Map[ToString, s]]
w1 = StringReplace[w, {"0100" -> "1"}]
st = ToCharacterCode[w1] - 48 (* A286419 *)
Flatten[Position[st, 0]] (* A286420 *)
Flatten[Position[st, 1]] (* A286421 *)
CROSSREFS
Sequence in context: A141676 A127164 A153972 * A111064 A071117 A054221
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, May 09 2017
STATUS
approved

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Last modified July 13 01:42 EDT 2024. Contains 374259 sequences. (Running on oeis4.)