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A172766
Number of 3*n X n 0..3 arrays with row sums 5 and column sums 15
1
0, 20, 95635680, 28021865662196736, 180748183717038324996985791, 15496001580602804970376043343562432320, 12274752385434683822697731132401886699781192750720
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A013812 A013894 A128671 * A048948 A172834 A271976
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved