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3, 4, 5, 9, 12, 13, 14, 18, 19, 20, 24, 27, 28, 29, 33, 36, 37, 38, 42, 43, 44, 48, 51, 52, 53, 57, 58, 59, 63, 66, 67, 68, 72, 75, 76, 77, 81, 82, 83, 87, 90, 91, 92, 96, 99, 100, 101, 105, 106, 107, 111, 114, 115, 116, 120, 121, 122, 126, 129, 130, 131
(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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-2 < n*r - a(n) < 2 for n >= 1, where r = (15 + 3*sqrt(5))/10.
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LINKS
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {0}}] &, {0}, 10] (* A003849 *)
w = StringJoin[Map[ToString, s]]
w1 = StringReplace[w, {"0" -> "001", "1" -> "110"}]
st = ToCharacterCode[w1] - 48 (* A287790 *)
Flatten[Position[st, 0]] (* A287791 *)
Flatten[Position[st, 1]] (* A287792 *)
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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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