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2, 5, 6, 9, 11, 14, 16, 17, 20, 23, 24, 27, 29, 30, 33, 36, 38, 41, 42, 45, 47, 50, 52, 53, 56, 59, 61, 64, 65, 68, 70, 71, 74, 77, 78, 81, 83, 86, 88, 89, 92, 95, 96, 99, 101, 102, 105, 108, 110, 113, 114, 117, 119, 120, 123, 126, 127, 130, 132, 135, 137
(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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a(n) - a(n-1) is in {1,2,3} for n>=2. Conjecture: a(n)/n -> 9/4.
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LINKS
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EXAMPLE
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As a word, A286339 = 01001100101001011001001100..., in which 1 is in positions 2,5,6,9,11,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)
w = StringJoin[Map[ToString, s]]
w1 = StringReplace[w, {"1101" -> "1"}]
st = ToCharacterCode[w1] - 48 (* A286339 *)
Flatten[Position[st, 0]] (* A286340 *)
Flatten[Position[st, 1]] (* A286341 *)
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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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