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1, 3, 7, 9, 13, 15, 17, 19, 23, 25, 29, 31, 35, 37, 41, 43, 45, 47, 51, 53, 57, 59, 61, 63, 67, 69, 73, 75, 79, 81, 85, 87, 89, 91, 95, 97, 101, 103, 105, 107, 111, 113, 117, 119, 121, 123, 127, 129, 133, 135, 137, 139, 143, 145, 149, 151, 155, 157, 161, 163
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OFFSET
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1,2
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COMMENTS
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Conjecture: -1 < n*r - a(n) < sqrt(3) for n>=1, where r = 1 + sqrt(3).
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LINKS
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EXAMPLE
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As a word, A285142 = 1010001010..., in which 1 is in positions 1,3,7,9,13,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 0, 1, 0}}] &, {0}, 11]; (* A285142 *)
Flatten[Position[s, 0]]; (* A285143 *)
Flatten[Position[s, 1]]; (* A285144 *)
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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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