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1, 2, 5, 6, 9, 10, 11, 12, 15, 16, 19, 20, 23, 24, 27, 28, 29, 30, 33, 34, 37, 38, 39, 40, 43, 44, 47, 48, 51, 52, 55, 56, 57, 58, 61, 62, 65, 66, 67, 68, 71, 72, 75, 76, 77, 78, 81, 82, 85, 86, 87, 88, 91, 92, 95, 96, 99, 100, 103, 104, 105, 106, 109, 110
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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, 1}}] &, {0}, 15]; (* A284490 *)
Flatten[Position[s, 0]]; (* A284491 *)
Flatten[Position[s, 1]]; (* A284492 *)
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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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