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1, 4, 5, 8, 9, 11, 14, 15, 17, 20, 21, 23, 25, 28, 29, 32, 33, 35, 37, 40, 41, 44, 45, 47, 50, 51, 53, 56, 57, 59, 61, 64, 65, 68, 69, 71, 73, 76, 77, 80, 81, 83, 86, 87, 89, 91, 94, 95, 98, 99, 101, 104, 105, 107, 110, 111, 113, 115, 118, 119, 122, 123, 125
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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, A285258 = 10011001101..., in which 1 is in positions 1,4,5,8,9,11,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {0, 1, 1, 0}}] &, {0}, 11]; (* A285258 *)
Flatten[Position[s, 0]]; (* A285259 *)
Flatten[Position[s, 1]]; (* A285260 *)
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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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