gamma : 1 0.999999989064903
gamma : 2 0.999999989064903
gamma : 3 1.99999997812981
gamma : 4 5.99999993438942
gamma : 5 23.9999997375577
gamma : 6 119.999998687788
gamma : 7 719.99999212673
gamma : 8 5039.99994488711