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A172719
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Number of 9*n X 18 0..2 arrays with row sums 2 and column sums n
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1
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12504636144000, 9055359650665478876752602576000, 46455761324619133018320834819622638940550400000000, 571951409844641024133465142141641285731325047530743069428902050000000
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listen;
history;
text;
internal format)
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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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