x,theoretical,practical
1,6.48301,6.48301
2,3.24151,3.25753
4,1.62075,1.66985
6,1.08050,1.34714
8,0.81038,1.06098
10,0.64830,1.18834
12,0.54025,1.15044
14,0.46307,1.12474
16,0.40519,1.09344