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A172765
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Number of 3*n X n 0..3 arrays with row sums 7 and column sums 21
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1
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0, 0, 352128, 28021865662196736, 82386976561127733213714195200, 6159222400147050126331043386857585651398400, 8076571943273575432916626559495058426486672272842882658769
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OFFSET
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1,3
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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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