%I #4 Dec 18 2015 18:18:11
%S 1,4,36,450,5172,75204,1353240,27948312
%N Number of n X n binary matrices with zero diagonal and x(i,j), x(j,k) and x(k,i) not all equal for i,j,k all different
%e Some solutions for n=4
%e ..0..1..1..1....0..0..0..0....0..1..1..1....0..0..1..1....0..0..0..1
%e ..1..0..0..1....1..0..0..0....0..0..1..1....0..0..1..1....0..0..1..1
%e ..0..0..0..1....1..1..0..1....0..1..0..0....1..1..0..0....1..1..0..0
%e ..0..0..1..0....1..1..0..0....0..0..0..0....0..1..0..0....1..1..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jun 15 2012
