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A288742
Positions of 0 in A288741; complement of A285697.
3
1, 3, 6, 7, 8, 9, 11, 14, 17, 20, 21, 22, 23, 25, 28, 29, 30, 31, 33, 36, 39, 42, 45, 48, 49, 50, 51, 53, 56, 57, 58, 59, 61, 64, 67, 70, 71, 72, 73, 75, 78, 79, 80, 81, 83, 86, 89, 92, 95, 98, 101, 104, 105, 106, 107, 109, 112, 113, 114, 115, 117, 120, 123
OFFSET
1,2
COMMENTS
Conjecture: a(n)/n -> 2, and 0 < 2 - a(n)/n) < 1 for n >= 1.
LINKS
MATHEMATICA
s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "01"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[23]] - 48 (* A288741 *)
Flatten[Position[st, 0]] (* A288742 *)
Flatten[Position[st, 1]] (* A285697 *)
CROSSREFS
Sequence in context: A073417 A299493 A047559 * A113826 A376588 A053030
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 17 2017
STATUS
approved