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A172660
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Number of 2*n X 4 0..2 arrays with row sums 2 and column sums n
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1
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6, 282, 16260, 1093050, 79796556, 6152037276, 492872166072, 40629560387130, 3423871305383100, 293631119403639732, 25543657090245824712, 2248575441654260591964, 199926155194724792622600
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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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