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A249028
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Number of 4X4X...X4 = 4^n arrays of 0's and 1's with exactly one 1 in each row, column, ..., line, ... .
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2
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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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a(2)=24 because these are the 4X4 0,1 matrices representing the permutations of 4 letters.
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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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