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A215395
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Number of length-n 0..2 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree"), and new values introduced in order 0..2.
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0
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1, 1, 1, 2, 0, 3, 0, 4, 0, 0, 11, 12, 13, 0, 5, 8, 0, 42, 38, 50, 7, 77, 115, 120, 125, 117, 135, 210, 348, 645, 837, 928, 792, 986
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OFFSET
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1,4
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COMMENTS
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LINKS
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EXAMPLE
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All solutions for n=6:
..0....0....0
..1....1....1
..2....0....2
..1....2....0
..0....1....2
..2....2....1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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