A172563 Number of 3*n X n 0..1 arrays with row sums 3 and column sums 9

0, 0, 1, 369600, 2604964362000, 89365729945562642000, 12218892645550878420052920000, 5638345005774311804302107347272704000, 7664603814657718197913972357390335773198400000

Offset

1,4

Links

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

Crossrefs

Sequence in context: A199496 A234048 A125001 * A172582 A172682 A172778

Adjacent sequences: A172560 A172561 A172562 * A172564 A172565 A172566

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved