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2, 3, 4, 5, 7, 8, 9, 11, 12, 14, 16, 17, 18, 19, 21, 23, 24, 25, 26, 27, 29, 30, 31, 33, 34, 36, 38, 39, 40, 42, 43, 44, 45, 47, 48, 50, 52, 53, 54, 55, 56, 58, 60, 61, 62, 63, 65, 66, 67, 69, 70, 72, 74, 75, 76, 77, 79, 81, 82, 83, 84, 85, 87, 89, 90, 91
(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 -> 1.38..., 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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MATHEMATICA
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s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "010"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[22]] - 48 (* A288220 *)
Flatten[Position[st, 0]] (* A288221 *)
Flatten[Position[st, 1]] (* A288222 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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