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A206093
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Number of (n+1) X 8 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.
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1
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205416, 165936, 240192, 1645920, 8613504, 56633472, 408445632, 2199502080, 14566314240, 105251128704, 567471536640, 3758109073920, 27154791205632, 146407656453120, 969592141071360, 7005936131053056, 37773175364904960
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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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FORMULA
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Empirical: a(n) = 258*a(n-3) for n>10.
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EXAMPLE
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Some solutions for n=4:
..1..2..2..0..1..1..2..0....2..0..0..1..2..2..0..0....0..1..2..0..1..1..2..0
..0..1..2..2..0..1..1..2....0..0..1..2..2..0..1..1....1..1..2..2..0..1..1..2
..0..0..1..2..2..0..1..1....0..1..2..2..0..1..1..0....2..2..1..2..2..0..1..1
..1..0..0..1..2..2..0..0....1..2..2..0..1..1..0..1....0..2..2..0..2..2..0..1
..2..1..0..0..1..2..0..2....1..2..0..1..1..2..1..1....1..0..2..2..1..2..2..0
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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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