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A172649
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Number of 2*n X n 0..2 arrays with row sums 3 and column sums 6
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1
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0, 6, 5881, 34145664, 755265546000, 50432680389260400, 8610740229284196003000, 3321735626954282018581900800, 2631822682451717147804985743769600, 3970498303510674585925708059712525440000
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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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