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2, 5, 7, 10, 13, 15, 18, 21, 24, 27, 29, 32, 35, 37, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 67, 70, 73, 75, 78, 81, 84, 87, 89, 92, 95, 97, 100, 103, 105, 108, 111, 113, 116, 119, 122, 125, 127, 130, 133, 135, 138, 141, 144, 147, 149, 152, 155, 157, 160
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OFFSET
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1,1
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COMMENTS
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Conjecture: 0 < n*r - a(n) < 3, where r = 1 + sqrt(3).
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LINKS
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EXAMPLE
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As a word, A285205 = 01001010010010..., in which 1 is in positions 2,5,7,10,,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 0, 0}}] &, {0}, 12]; (* A285205 *)
Flatten[Position[s, 0]]; (* A285206 *)
Flatten[Position[s, 1]]; (* A285207 *)
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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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