A172540 Number of n X n 0..1 arrays with row sums 9 and column sums 9.

0, 0, 0, 0, 0, 0, 0, 0, 1, 3628800, 158815387962000, 9254768770160124288000, 769237071909157579108571190000, 96986285294151066094112970262797953280, 19092174983817380047229162651397270697765056000

Offset

1,10

Links

R. H. Hardin, Table of n, a(n) for n=1..20

Crossrefs

Column k=9 of A008300.

Sequence in context: A179065 A213872 A227672 * A071552 A181726 A195394

Adjacent sequences: A172537 A172538 A172539 * A172541 A172542 A172543

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved