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A172649
Number of 2*n X n 0..2 arrays with row sums 3 and column sums 6
1
0, 6, 5881, 34145664, 755265546000, 50432680389260400, 8610740229284196003000, 3321735626954282018581900800, 2631822682451717147804985743769600, 3970498303510674585925708059712525440000
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A367958 A011788 A320446 * A111152 A202969 A003191
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved