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A172666
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Number of 3*n X n 0..2 arrays with row sums 7 and column sums 21
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1
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0, 0, 0, 369600, 8432855707512236000, 2333327772435239191435579651896000, 7912042661932746320895028318655823357822209601009, 288661272140059402021783839980598829830361488723258925444306851840
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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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