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A172708
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Number of 7*n X n 0..2 arrays with row sums 3 and column sums 21
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1
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0, 3432, 8385127334900305, 6691944921318182113271713149120, 560802479516289977082608657662771140464350896000, 2224408910230139891062284534118773609167351452658037731567555400000
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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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