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A172758
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Number of 2*n X 6 0..3 arrays with row sums 3 and column sums n
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1
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20, 16260, 20933840, 33833709700, 62810128195920, 127676780106968400, 276686670102097569600, 628807365128705353776900, 1482500191777802616831698000, 3598791496054686645936395190160
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OFFSET
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1,1
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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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