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1, 4, 5, 6, 8, 9, 10, 11, 13, 15, 18, 19, 20, 21, 23, 25, 27, 30, 31, 32, 33, 36, 37, 38, 39, 42, 43, 44, 46, 47, 48, 49, 51, 53, 55, 58, 59, 60, 61, 64, 65, 66, 67, 70, 71, 72, 73, 76, 77, 78, 80, 81, 82, 83, 85, 87, 89, 92, 93, 94, 96, 97, 98, 99, 101, 103
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OFFSET
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1,2
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COMMENTS
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Conjecture: -3 < n*r - a(n) < 3 for n >= 1, where r = (3+sqrt(3))/3.
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LINKS
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EXAMPLE
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As a word, A284901 = 01100010..., in which 0 is in positions 1,4,5,6,8,9,11,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {0, 0, 1, 1}}] &, {0}, 6] (* A284901 *)
Flatten[Position[s, 0]] (* A284902 *)
Flatten[Position[s, 1]] (* A284903 *)
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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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