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2, 4, 6, 9, 11, 13, 16, 18, 20, 23, 25, 27, 29, 31, 33, 36, 38, 40, 43, 45, 47, 50, 52, 54, 56, 58, 60, 63, 65, 67, 70, 72, 74, 77, 79, 81, 83, 85, 87, 90, 92, 94, 97, 99, 101, 104, 106, 108, 111, 113, 115, 118, 120, 122, 125, 127, 129, 131, 133, 135, 138
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OFFSET
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1,1
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COMMENTS
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Conjecture: -2 < n*r - a(n) < 2 for n >= 1, where r = (9+sqrt(21))/6.
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LINKS
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EXAMPLE
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The first 6 letters of the word in A284364 are 101010, in which the positions of 0 are 2,4,6.
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {1}, 1 -> {1, 0, 1, 0, 1, 0}}] &, {0}, 10] (* A284364 *)
Flatten[Position[s, 0]] (* A284365 *)
Flatten[Position[s, 1]] (* A284366 *)
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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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