SOD 6.2: Second-order designs program
(c) 2010 Design Computing (designcomputing.net/)

Note: Best design for 4 factors in 45 runs.

try #     	10
seed      	-1719045555
# of iterations	22
f         	32.00 (0)
det       	2.3702741E19
det*      	0.435

Factor levels:

(1)	(2)	(3)	(4)	
-1	-1	0	-1	
-1	-1	1	1	
-1	-1	1	-1	
-1	-1	-1	0	
-1	-1	-1	1	
1	-1	-1	-1	
1	-1	0	1	
1	-1	-1	1	
1	-1	1	-1	
1	-1	1	0	
-1	1	1	1	
-1	1	-1	0	
-1	1	0	1	
-1	1	-1	-1	
-1	1	1	-1	
1	1	-1	-1	
1	1	1	0	
1	1	1	1	
1	1	-1	1	
1	1	0	-1	
-1	0	1	0	
-1	0	1	0	
-1	0	0	0	
-1	0	-1	1	
-1	0	-1	-1	
1	0	0	0	
1	0	1	-1	
1	0	1	1	
1	0	-1	0	
1	0	-1	0	
0	-1	0	1	
0	-1	1	1	
0	-1	0	0	
0	-1	-1	-1	
0	-1	0	-1	
0	1	0	-1	
0	1	1	-1	
0	1	0	1	
0	1	0	0	
0	1	-1	1	
0	0	0	0	
0	0	0	1	
0	0	1	0	
0	0	-1	0	
0	0	0	-1	

X'X

45	30	30	30	30	0	0	0	0	0	0	0	0	0	0	
	30	20	24	20	0	0	0	0	0	0	0	0	0	0	
		30	20	24	0	0	0	0	0	0	0	0	0	0	
			30	20	0	0	0	0	0	0	0	0	0	0	
				30	0	0	0	0	0	0	0	0	0	0	
					30	0	0	0	0	0	0	0	0	0	
						30	0	0	0	0	0	0	0	0	
							30	0	0	0	0	0	0	0	
								30	0	0	0	0	0	0	
									20	0	0	0	0	0	
										24	0	0	0	0	
											20	0	0	0	
												20	0	0	
													24	0	
														20	

inverse(X'X)

0.1492	-0.0476	-0.0476	-0.0476	-0.0476	0	0	0	0	0	0	0	0	0	-0	
	0.119	0	-0.0476	0	0	0	0	0	0	0	0	0	0	-0	
		0.119	0	-0.0476	0	0	0	0	0	0	0	0	0	-0	
			0.119	0	0	0	0	0	0	0	0	0	0	-0	
				0.119	0	0	0	0	0	0	0	0	0	-0	
					0.0333	0	0	0	0	0	0	0	0	-0	
						0.0333	0	0	0	0	0	0	0	-0	
							0.0333	0	0	0	0	0	0	-0	
								0.0333	0	0	0	0	0	-0	
									0.05	0	0	0	0	-0	
										0.0417	0	0	0	-0	
											0.05	0	0	-0	
												0.05	0	-0	
													0.0417	-0	
														0.05	

Note: Non-zero sums of squares contributing to f:
1122 (20)
1133 (24)
1144 (20)
2233 (20)
2244 (24)
3344 (20)

Note: The first 2 column(s) form the base design.
Note: SOD used 0.527 seconds.