A172664 Number of 3*n X n 0..2 arrays with row sums 4 and column sums 12

0, 1, 352128, 8365213132981, 2630024635942177123650, 7011583640699581889649892843200, 115401909362364329779895671658357933292000

Offset

1,3

Links

R. H. Hardin, Table of n, a(n) for n=1..17

Crossrefs

Sequence in context: A186822 A251246 A237098 * A172676 A172773 A172840

Adjacent sequences: A172661 A172662 A172663 * A172665 A172666 A172667

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved