j =  1  i =  2  alpha =  0.1000
 n   Rcrit
 4   0.910
 5   0.728
 6   0.610
 7   0.533
 8   0.480
 9   0.440
10   0.410
11   0.386
12   0.366
13   0.350
14   0.335
15   0.323
