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A172615
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Number of 9*n X 18 0..1 arrays with row sums 2 and column sums n
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1
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12504636144000, 3237415247416050491577971184000, 6055976192395031960092036887782708145734400000000, 27298383003921247460630029918586935761007187118066456599356950000000
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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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