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1, 2, 5, 6, 11, 12, 15, 16, 21, 22, 25, 26, 29, 30, 33, 34, 39, 40, 43, 44, 49, 50, 53, 54, 59, 60, 63, 64, 69, 70, 73, 74, 77, 78, 81, 82, 87, 88, 91, 92, 97, 98, 101, 102, 105, 106, 109, 110, 115, 116, 119, 120, 125, 126, 129, 130, 135, 136, 139, 140, 145
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OFFSET
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1,2
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COMMENTS
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Conjecture: a(n)/n -> (7 + sqrt(13))/6.
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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}, 14]; (* A284487 *)
Flatten[Position[s, 0]]; (* A284488 *)
Flatten[Position[s, 1]]; (* A284489 *)
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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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