a (r = 5)

V2-V16

V3-V15

V4-V14

V5-V13

1

0.2486

0.4960

0.7307

0.9043

2

1.0063

2.0205

2.9939

3.7516

3

2.4115

4.8589

7.2643

9.2902

4

5.1362

10.4186

15.8185

20.9415