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A172628
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Number of n X n 0..2 arrays with row sums 7 and column sums 7
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1
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0, 0, 0, 24, 111920, 2030271480, 91358224634433, 9350902053107858880, 2018328183128437950016800, 859819730886010540636567920000, 682948436592331311886782349445512800
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OFFSET
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1,4
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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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