A172540 - OEIS

%I #6 Apr 11 2017 16:03:29

%S 0,0,0,0,0,0,0,0,1,3628800,158815387962000,9254768770160124288000,

%T 769237071909157579108571190000,

%U 96986285294151066094112970262797953280,19092174983817380047229162651397270697765056000

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

%H R. H. Hardin, <a href="/A172540/b172540.txt">Table of n, a(n) for n=1..20</a>

%Y Column k=9 of A008300.

%K nonn

%O 1,10

%A _R. H. Hardin_, Feb 06 2010