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A283643
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The number of n X n real {0,1}-matrices the square of which is the all-ones matrix.
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1
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1, 0, 0, 12, 0, 0, 0, 0, 1330560, 0, 0, 0, 0, 0, 0
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OFFSET
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1,4
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COMMENTS
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See A283627 for much more information.
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LINKS
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CROSSREFS
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The main entry for this problem is A283627.
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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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