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A067212
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Number of n X n 0..4 matrices with all row and column sums equal.
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1
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5, 25, 1001, 790425, 11991502235, 3632894572698505, 22823286475857170293275, 3059096488092534208632573065881, 8933959513305390145234950731901862541009, 577809775169956916510410207413319463664222819419555
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Some solutions for n=3
..4..4..3....2..1..1....2..1..1....4..0..4....1..2..4....3..2..2....3..2..1
..4..3..4....1..3..0....2..0..2....0..4..4....2..3..2....2..1..4....0..3..3
..3..4..4....1..0..3....0..3..1....4..4..0....4..2..1....2..4..1....3..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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EXTENSIONS
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STATUS
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approved
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