%I #4 Mar 31 2012 12:36:12
%S 1,4,39,723,21965,968230,57967660,4505774905,439923593145,
%T 52601045792520
%N Number of (3*n)Xn binary arrays with rows in nonincreasing order, 3 ones in every column and no more than 3 ones in any row
%C Row 3 of A188416
%e All solutions for 6X2
%e ..1..0....1..1....1..1....1..1
%e ..1..0....1..1....1..0....1..1
%e ..1..0....1..0....1..0....1..1
%e ..0..1....0..1....0..1....0..0
%e ..0..1....0..0....0..1....0..0
%e ..0..1....0..0....0..0....0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 30 2011