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A172834
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Number of 3*n X n 0..4 arrays with row sums 7 and column sums 21
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1
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0, 20, 2332105236, 55821470965449838000, 73884729561168010198433552532700, 2932027248013823224822937070664663188676388640, 2229074240908452234163017626536657006251051388006192816445889
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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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