A172648 Number of 2*n X n 0..2 arrays with row sums 9 and column sums 18

0, 0, 0, 0, 113400, 50432680389260400, 101720498887190010630546323580, 1021718304724615708073668620385984867252800, 52487498990202837315687104908805779583934003413314100425

Offset

1,5

Links

R. H. Hardin, Table of n, a(n) for n=1..11

Crossrefs

Sequence in context: A172549 A172589 A172692 * A259010 A259003 A256901

Adjacent sequences: A172645 A172646 A172647 * A172649 A172650 A172651

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved