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A288933 Positions of 0 in A288932; complement of A288934. 3
2, 4, 7, 9, 13, 15, 18, 20, 25, 27, 30, 32, 36, 38, 41, 43, 49, 51, 54, 56, 60, 62, 65, 67, 72, 74, 77, 79, 83, 85, 88, 90, 97, 99, 102, 104, 108, 110, 113, 115, 120, 122, 125, 127, 131, 133, 136, 138, 144, 146, 149, 151, 155, 157, 160, 162, 167, 169, 172 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Conjecture: a(n)/n -> 3, and 0 < 3 - a(n)/n < 1 for n >= 1.
LINKS
FORMULA
a(n) = 3*n-1-HammingWeight(n-1) = 3*n-1-A000120(n-1) (conjectured). - Gleb Koloskov, May 06 2021
MATHEMATICA
s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "1" -> "10101"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[11]] - 48 (* A288932 *)
Flatten[Position[st, 0]] (* A288933 *)
Flatten[Position[st, 1]] (* A288934 *)
CROSSREFS
Sequence in context: A087158 A195669 A277733 * A129259 A077597 A183873
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 25 2017
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)