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A268206
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Number of 2Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value.
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2
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4, 81, 3600, 324900, 48441600, 10817248036, 3377332413504, 1404654302923524, 750581746192664100, 501056831514160707984, 408622467650013146382336, 399732806541644129265761569, 461983489514281294192077209856
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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=3
..0..1..1....1..3..1....3..1..2....2..3..1....3..2..2....3..0..1....2..2..0
..1..2..1....3..0..1....3..0..3....1..2..0....2..1..3....0..1..0....2..1..2
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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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