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1, 5, 6, 7, 8, 9, 10, 11, 15, 19, 23, 27, 31, 35, 39, 40, 41, 42, 43, 44, 45, 49, 50, 51, 52, 53, 54, 55, 59, 60, 61, 62, 63, 64, 65, 69, 70, 71, 72, 73, 74, 75, 79, 80, 81, 82, 83, 84, 85, 89, 90, 91, 92, 93, 94, 95, 99, 100, 101, 102, 103, 104, 105, 109
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OFFSET
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1,2
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COMMENTS
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Conjecture: a(n)/n -> 2.
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LINKS
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EXAMPLE
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As a word, A285617 = 1000111111100010001001..., in which 1 is in positions 1,5,6,7,8,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {1, 0, 0, 0}}] &, {0}, 10] (* A285617 *)
Flatten[Position[s, 0]] (* A285618 *)
Flatten[Position[s, 1]] (* A285619 *)
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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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