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A267972
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Number of nX4 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.
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1
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250, 62500, 12067722, 2208460532, 370962601314, 58977586280183, 8920181825287255, 1295459314730053526, 181620283990314798496, 24698703052360112375559, 3269943855458863743367027
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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=2
..0..1..0..3....0..1..0..0....3..2..1..1....2..0..3..0....0..3..2..0
..3..1..3..0....0..3..1..2....2..3..2..2....0..3..2..1....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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