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2, 4, 8, 12, 15, 18, 22, 25, 28, 32, 34, 36, 39, 41, 43, 46, 49, 52, 56, 58, 60, 63, 65, 67, 70, 73, 76, 80, 84, 88, 90, 92, 95, 99, 103, 105, 107, 110, 112, 114, 117, 119, 121, 124, 127, 130, 134, 138, 142, 144, 146, 149, 153, 157, 159, 161, 164, 166, 168
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Conjecture: a(n)/n -> 2.91, and if m denotes this number, then -1 < m - a(n)/n < 1 for n >= 1.
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LINKS
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Clark Kimberling, Table of n, a(n) for n = 1..10000
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MATHEMATICA
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s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "0101", "10" -> "001"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[19]] - 48 (* A288512 *)
Flatten[Position[st, 0]] (* A288513 *)
Flatten[Position[st, 1]] (* A288514 *)
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CROSSREFS
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Cf. A288512, A288513.
Sequence in context: A050865 A354109 A354919 * A350616 A282667 A124395
Adjacent sequences: A288511 A288512 A288513 * A288515 A288516 A288517
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KEYWORD
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nonn,easy
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AUTHOR
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Clark Kimberling, Jun 13 2017
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STATUS
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approved
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