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A215394
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Number of length-n 0..n arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree"), and new values introduced in order 0..n.
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0
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1, 1, 1, 3, 6, 27, 99, 463, 2233, 11875, 66925, 402364, 2555606, 17115329, 120368115, 886510373, 6819231506
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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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Some solutions for n=6:
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1
..2....2....2....2....0....0....2....2....2....2....2....0....2....2....0....2
..0....3....3....0....2....2....3....3....0....3....1....2....0....3....2....0
..2....2....1....3....0....3....4....0....3....0....0....3....3....1....1....1
..1....4....4....4....3....2....1....2....2....4....3....4....1....2....3....3
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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