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

Author

R. H. Hardin, Feb 06 2010

Keywords

• nonn

Links

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

Crossrefs

Column k=9 of A008300.