RAT 8.0: Program for Constructing Trend-Free Designs
(c) 2015 Design Computing (http://designcomputing.net/)

Note: Best design for m=3, p=8 and n=15

Try	iter	f	trace	det*	TF
1	6	0	0.6611	0.8728	1

Plan for try 1 using seed 1442759454873 (columns 2-4):

-1	-1	1	-1	
-0.8571	-1	1	1	
-0.7143	1	1	-1	
-0.5714	-1	-1	1	
-0.4286	-1	-1	-1	
-0.2857	1	-1	-1	
-0.1429	1	-1	1	
0	1	1	1	
0.1429	1	-1	1	
0.2857	1	-1	-1	
0.4286	-1	-1	-1	
0.5714	-1	-1	1	
0.7143	1	1	-1	
0.8571	-1	1	1	
1	-1	1	-1	

X'X

5.7143	-0	-0	0	0	0	-0	-0	
	15	-1	-1	-1	-1	-1	-1	
		15	-1	-1	-1	-1	-1	
			15	-1	-1	-1	-1	
				15	-1	-1	-1	
					15	-1	-1	
						15	-1	
							15	

inverse(X'X)

0.175	0	0	-0	-0	0	0	0	
	0.0694	0.0069	0.0069	0.0069	0.0069	0.0069	0.0069	
		0.0694	0.0069	0.0069	0.0069	0.0069	0.0069	
			0.0694	0.0069	0.0069	0.0069	0.0069	
				0.0694	0.0069	0.0069	0.0069	
					0.0694	0.0069	0.0069	
						0.0694	0.0069	
							0.0694	

Note: RAT used 0.001 seconds.