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A172923
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Number of n X n 0..7 arrays with row sums 9 and column sums 9.
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1
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0, 6, 1216, 2113288, 20095347085, 828045453260560, 122498884159587560730, 56021411242071401516696320, 70241609479301663107223809203427, 218979482042361137186381999071773029400
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OFFSET
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1,2
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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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