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A226321
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Number of real {0,1} matrices n X n which are the square of a {0,1} matrix.
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2
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OFFSET
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0,2
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COMMENTS
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LINKS
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EXAMPLE
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The 8 solutions when n=2 are:
00 00 00 01 10 10 10 11
00 01 11 01 00 01 10 00
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CROSSREFS
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KEYWORD
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nonn,more,hard
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AUTHOR
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STATUS
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approved
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