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A287567
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Positions of 0 in A287566.
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6
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1, 7, 10, 16, 18, 24, 25, 31, 36, 37, 43, 46, 51, 54, 60, 61, 68, 69, 75, 78, 83, 86, 92, 93, 97, 103, 106, 112, 114, 120, 121, 127, 131, 134, 140, 141, 145, 151, 154, 160, 162, 168, 169, 175, 180, 181, 187, 190, 194, 200, 201, 207, 212, 213, 219, 222, 227
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OFFSET
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1,2
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COMMENTS
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a(n) - a(n-1) is in {1,2,3,4,5,6,7} for n >= 1; also, 4n - a(n) is in {0,1,2,3} for n >= 1. The first 20 numbers 4n - a(n) are 3, 1, 2, 0, 2, 0, 3, 1, 0, 3, 1, 2, 1, 2, 0, 3, 0, 3, 1, 2, with
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LINKS
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {0, 2, 3, 1}, 1 -> {2, 3, 2, 0}, 2 -> {3, 1, 0, 2}, 3 -> {1, 0, 2, 3}}] &, {0}, 9]; (* A287566 *)
Flatten[Position[s, 0]]; (* A287567 *)
Flatten[Position[s, 1]]; (* A287568 *)
Flatten[Position[s, 2]]; (* A287569 *)
Flatten[Position[s, 3]]; (* A287570 *)
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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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