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1, 4, 6, 8, 9, 12, 13, 16, 18, 20, 21, 24, 25, 28, 30, 31, 34, 36, 38, 39, 42, 43, 46, 48, 49, 52, 54, 56, 57, 60, 61, 64, 66, 67, 70, 72, 73, 76, 78, 80, 81, 84, 85, 88, 90, 92, 93, 96, 97, 100, 102, 103, 106, 108, 109, 112, 114, 116, 117, 120, 121, 124
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OFFSET
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1,2
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COMMENTS
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Conjecture: 2n - a(n) is in {0,1} for n>=1.
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LINKS
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EXAMPLE
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As a word, A285255 = 011010..., in which 0 is in positions 1,4,6,8,9,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 1, 0}}] &, {0}, 12]; (* A285255 *)
Flatten[Position[s, 0]]; (* A285256 *)
Flatten[Position[s, 1]]; (* A285257 *)
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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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