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1, 2, 4, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16, 18, 19, 20, 22, 23, 24, 25, 26, 28, 29, 30, 32, 33, 34, 36, 37, 38, 40, 41, 42, 44, 45, 46, 47, 48, 50, 51, 52, 54, 55, 56, 58, 59, 60, 61, 62, 64, 65, 66, 68, 69, 70, 72, 73, 74, 75, 76, 78, 79, 80, 82, 83, 84
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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) < 4 for n>=1, where r = (1 + sqrt(17))/4.
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LINKS
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EXAMPLE
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As a word, A285668 = 11011101..., in which 1 is in positions 1,2,4,5,6,8,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {1, 1, 0, 1}}] &, {0}, 9] (* A285668 *)
Flatten[Position[s, 0]] (* A285669 *)
Flatten[Position[s, 1]] (* A285670 *)
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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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