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1, 3, 6, 7, 9, 12, 14, 17, 18, 20, 24, 27, 29, 32, 33, 34, 36, 39, 40, 42, 45, 47, 50, 51, 53, 57, 60, 62, 65, 66, 68, 71, 73, 76, 77, 79, 83, 86, 88, 91, 92, 93, 95, 98, 99, 101, 104, 106, 109, 110, 112, 116, 120, 123, 125, 128, 129, 131, 135, 138, 140, 143
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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, 1, 0, 0}}] &, {0}, 17]; (* A284471 *)
Flatten[Position[s, 0]]; (* A284472 *)
Flatten[Position[s, 1]]; (* A284473*)
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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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