A172765 Number of 3*n X n 0..3 arrays with row sums 7 and column sums 21

0, 0, 352128, 28021865662196736, 82386976561127733213714195200, 6159222400147050126331043386857585651398400, 8076571943273575432916626559495058426486672272842882658769

Offset

1,3

Links

R. H. Hardin, Table of n, a(n) for n=1..10

Crossrefs

Sequence in context: A172840 A172886 A172916 * A205632 A205334 A140942

Adjacent sequences: A172762 A172763 A172764 * A172766 A172767 A172768

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved