A172766 Number of 3*n X n 0..3 arrays with row sums 5 and column sums 15

0, 20, 95635680, 28021865662196736, 180748183717038324996985791, 15496001580602804970376043343562432320, 12274752385434683822697731132401886699781192750720

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n=1..13

Crossrefs

Sequence in context: A013812 A013894 A128671 * A048948 A172834 A271976

Adjacent sequences: A172763 A172764 A172765 * A172767 A172768 A172769

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved