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A172550
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Number of 2*n X n 0..1 arrays with row sums 9 and column sums 18.
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1
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0, 0, 0, 0, 0, 0, 0, 0, 1, 2375880867360000, 86574740102712303011539719750000, 3113598948052994576761792558312393011168670080000, 177115577520155240531744027851206753629735074356474328692651750000
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OFFSET
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1,10
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LINKS
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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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