FEADO 6.2: D-optimal designs Program
(c) 2010 Design Computing (designcomputing.net/)

Note: Best design for m=5, p=21, and n=21.

try #     	71
seed      	-863820736
# of iterations	4
det       	4.611686E20
det*      	0.45895913
det^(-1)  	2.1684043E-21
det^(-1/p)	0.10375444
trace V   	5.45
vmax      	1.9325
vbar      	1.4492
G-eff     	51.75%

Design points (and prediction variance):

-1	-1	-1	-1	1	(1.0)
-1	-1	-1	1	-1	(1.0)
-1	-1	1	-1	-1	(1.0)
-1	-1	1	1	1	(1.0)
-1	1	-1	-1	-1	(1.0)
-1	1	-1	1	1	(1.0)
-1	1	1	-1	1	(1.0)
-1	1	1	1	-1	(1.0)
0	-1	0	0	-1	(1.0)
0	-1	0	1	0	(1.0)
0	0	-1	0	0	(1.0)
0	0	0	1	-1	(1.0)
1	-1	-1	-1	-1	(1.0)
1	-1	-1	1	1	(1.0)
1	-1	1	-1	1	(1.0)
1	-1	1	1	-1	(1.0)
1	0	0	0	0	(1.0)
1	1	-1	-1	1	(1.0)
1	1	-1	1	-1	(1.0)
1	1	1	-1	-1	(1.0)
1	1	1	1	1	(1.0)

X'X

21	17	18	17	18	18	1	-2	-1	2	-2	0	-0	-0	0	0	-1	1	-0	0	-1	
	17	16	16	16	16	1	-0	0	0	-0	0	-0	-0	0	0	0	-0	-0	0	-0	
		18	16	17	17	-0	-2	0	1	-1	0	-0	-0	0	0	-1	1	-0	0	-0	
			17	16	16	-0	-0	-1	0	-0	0	-0	-0	0	0	0	-0	-0	0	-0	
				18	17	-0	-1	0	2	-1	0	-0	-0	0	0	-1	-0	-0	0	-1	
					18	-0	-1	0	1	-2	0	-0	-0	0	0	0	1	-0	0	-1	
						17	0	0	-0	0	0	-0	0	0	0	0	0	0	0	0	
							18	-0	-1	1	-0	-0	-0	-0	-0	1	-1	0	-0	-0	
								17	0	-0	-0	0	0	0	-0	-0	0	0	0	-0	
									18	-1	-0	0	-0	-0	-0	-1	0	0	-0	-1	
										18	0	-0	-0	-0	0	0	-1	-0	-0	1	
											16	-0	-0	0	0	0	-0	-0	-0	0	
												16	0	-0	0	-0	0	0	-0	-0	
													16	0	-0	-0	0	0	-0	-0	
														16	0	0	-0	-0	0	-0	
															16	-0	-0	-0	-0	0	
																17	-0	-0	-0	0	
																	17	0	0	-0	
																		16	0	-0	
																			16	-0	
																				17	

inverse(X'X)

0.5075	-0.0825	-0.1225	-0.0825	-0.1225	-0.1225	-0.025	0.025	0.025	-0.025	0.025	-0	0	-0	-0	-0	0.0125	-0.0125	0	-0	0.0125	
	0.72	-0.09	-0.3425	-0.09	-0.09	-0.0375	-0.025	-0.025	0.025	-0.025	-0	0	0	-0	-0	-0.0125	0.0125	0	-0	-0.0125	
		0.855	-0.09	-0.27	-0.27	0.0125	0.05	-0.0125	0.0125	-0.0125	-0	0	0	-0	0	0.025	-0.025	0	-0	-0.0375	
			0.72	-0.09	-0.09	0.025	-0.025	0.0375	0.025	-0.025	0	-0	-0	0	0	-0.0125	0.0125	-0	0	-0.0125	
				0.855	-0.27	0.0125	-0.0125	-0.0125	-0.05	-0.0125	-0	0	0	-0	-0	0.025	0.0375	0	-0	0.025	
					0.855	0.0125	-0.0125	-0.0125	0.0125	0.05	0	-0	0	0	-0	-0.0375	-0.025	-0	0	0.025	
						0.0625	-0	-0	0	-0	-0	-0	-0	-0	0	-0	-0	-0	-0	-0	
							0.0625	0	0	-0	-0	0	0	0	-0	0	-0	-0	0	0	
								0.0625	-0	0	0	-0	-0	0	0	0	-0	-0	-0	0	
									0.0625	0	0	-0	-0	0	0	0	-0	-0	0	0	
										0.0625	-0	0	0	0	-0	-0	0	0	0	-0	
											0.0625	0	0	-0	-0	-0	0	0	0	-0	
												0.0625	-0	0	-0	0	-0	-0	0	0	
													0.0625	-0	0	0	-0	-0	0	0	
														0.0625	-0	-0	0	0	-0	0	
															0.0625	0	0	0	0	-0	
																0.0625	0	0	0	-0	
																	0.0625	-0	-0	0	
																		0.0625	-0	0	
																			0.0625	0	
																				0.0625	

Note: vmax and vbar are maximum and average prediction variances over candidate points.
Note: FEADO used 0.793 seconds.