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A215227
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Number of length-n 0..7 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
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0
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8, 56, 336, 2352, 15120, 105168, 710640, 4883424, 33384960, 228945360, 1568401296, 10751253072, 73683206688, 505043014560
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=5:
..7....2....0....6....7....7....6....7....3....7....6....0....1....2....5....0
..6....4....5....5....0....5....7....3....1....1....1....1....0....5....6....4
..1....3....6....7....6....7....5....7....5....5....5....2....7....1....3....1
..5....5....2....3....0....1....6....0....0....3....1....6....5....4....5....6
..0....6....1....5....4....4....1....6....4....4....7....7....0....0....7....4
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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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