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A172729
Number of n X n 0..3 arrays with row sums 15 and column sums 15
1
0, 0, 0, 0, 1, 20933840, 2310106618930215, 771548465309275841582080, 808064031263375768787771957383712, 2633262235838582855557285384905264898523904
OFFSET
1,6
LINKS
CROSSREFS
Sequence in context: A254497 A254490 A253862 * A174115 A189123 A206108
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved