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A172796
Number of 7*n X 3*n 0..3 arrays with row sums 3 and column sums 7
1
248137, 276686670102097569600, 12577849178653907149465594061673565824000, 633070426668791623743477133016092146118990897169495988019200000, 6041723108140506139185920296627256100375775025140875595591377857737131840561930240000000
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A052198 A053077 A229872 * A268842 A223238 A017405
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved