A172753 Number of 2*n X n 0..3 arrays with row sums 3 and column sums 6.

1, 44, 28681, 122975608, 2217051589200, 127676780106968400, 19483897303054057473600, 6882009860546294146142870400, 5078640963785630003833500263433600

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n=1..42

Crossrefs

Sequence in context: A323315 A007105 A180842 * A268425 A183749 A119096

Adjacent sequences: A172750 A172751 A172752 * A172754 A172755 A172756

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved