A172763 Number of 3*n X n 0..3 arrays with row sums 3 and column sums 9.

1, 580, 19546975, 11012437532800, 53461314050652508000, 1482500191777802616831698000, 177485739636656023698217362159890000, 74896615128945574656737417426177604440960000

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n=1..23

Crossrefs

Sequence in context: A186784 A185606 A206616 * A172835 A172883 A260541

Adjacent sequences: A172760 A172761 A172762 * A172764 A172765 A172766

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved