A172566 Number of 3*n X n 0..1 arrays with row sums 6 and column sums 18

0, 0, 0, 0, 0, 1, 182509367040000, 712008996110160366168717566400, 7664603814657718197913972357390335773198400000, 299436894513044390420517533660659195248061275496427347927110000

Offset

1,7

Links

R. H. Hardin, Table of n, a(n) for n=1..12

Crossrefs

Sequence in context: A320874 A348801 A288278 * A214947 A364413 A295354

Adjacent sequences: A172563 A172564 A172565 * A172567 A172568 A172569

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved