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1, 5, 8, 9, 13, 19, 22, 24, 27, 28, 32, 36, 39, 40, 46, 47, 51, 57, 58, 64, 68, 71, 73, 76, 77, 81, 85, 88, 89, 93, 99, 102, 104, 107, 108, 114, 115, 121, 123, 126, 127, 131, 135, 138, 139, 145, 146, 152, 154, 157, 158, 164, 165, 169, 173, 176, 177, 181, 187
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Conjecture: a(n)/n -> 3.19..., and if m denotes this number, then -1 < m - a(n)/n) < 3 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" -> "001"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[23]] - 48 (* A287530 *)
Flatten[Position[st, 0]] (* A287531 *)
Flatten[Position[st, 1]] (* A287551 *)
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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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