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1, 2, 5, 7, 8, 9, 12, 14, 17, 21, 23, 24, 27, 29, 32, 34, 35, 38, 40, 41, 42, 45, 47, 48, 49, 52, 54, 57, 61, 63, 64, 67, 69, 72, 74, 75, 78, 80, 83, 87, 89, 90, 93, 95, 98, 102, 106, 108, 109, 112, 114, 117, 119, 120, 123, 125, 126, 127, 130, 132, 135, 139
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OFFSET
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1,2
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COMMENTS
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Conjecture: a(n)/n -> (1 + sqrt(13))/2.
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LINKS
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1}, 1 -> {0, 0, 1, 0}}] &, {0}, 9] (* A284527 *)
Flatten[Position[s, 0]] (* A284528 *)
Flatten[Position[s, 1]] (* A284529 *)
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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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