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2, 3, 8, 9, 11, 12, 14, 15, 20, 21, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 44, 45, 50, 51, 53, 54, 56, 57, 62, 63, 68, 69, 71, 72, 74, 75, 77, 78, 80, 81, 83, 84, 86, 87, 92, 93, 98, 99, 101, 102, 104, 105, 110, 111, 116, 117, 119, 120, 122, 123, 125, 126
(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, and -2/3 < 2 - a(n)/n) < 1/2 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" -> "01"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[22]] - 48 (* A288736 *)
Flatten[Position[st, 0]] (* A288737 *)
Flatten[Position[st, 1]] (* A288740 *)
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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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