FRAC 6.1: Construct fractional factorial designs
(c) 2009 Design Computing (designcomputing.net/)

Note: Best design for m=3, p=10, and n=16.

try #     	2
seed      	2008699619
# of iterations	7
f         	0.0 (R)
det       	3.3554432E7
det*      	0.3536
std. det  	3.0517578E-5
trace V   	2.125

Factor levels:

-1	0	-1	
-1	1	0	
-1	-1	0	
-1	0	1	
1	-1	0	
1	1	0	
1	0	1	
1	0	-1	
0	1	1	
0	-1	-1	
0	1	-1	
0	-1	1	
0	0	0	
0	0	0	
0	0	0	
0	0	0	

X'X

16	8	8	8	0	0	0	0	0	0	
	8	4	4	0	0	0	0	0	0	
		8	4	0	0	0	0	0	0	
			8	0	0	0	0	0	0	
				8	0	0	0	0	0	
					8	0	0	0	0	
						8	0	0	0	
							4	0	0	
								4	0	
									4	

inverse(X'X)

0.25	-0.125	-0.125	-0.125	0	0	0	0	0	-0	
	0.25	0	0	0	0	0	0	0	-0	
		0.25	0	0	0	0	0	0	-0	
			0.25	0	0	0	0	0	-0	
				0.125	0	0	0	0	-0	
					0.125	0	0	0	-0	
						0.125	0	0	-0	
							0.25	0	-0	
								0.25	-0	
									0.25	

Note: The first 1 columns of the design form the base design.
Note:  FRAC used 0.0 seconds.