sgamma(1)=0.999999989, gamma(1)=1
sgamma(2)=0.999999989, gamma(2)=1
sgamma(3)=1.99999998, gamma(3)=2
sgamma(4)=5.99999993, gamma(4)=6
sgamma(5)=23.9999997, gamma(5)=24
sgamma(6)=119.999999, gamma(6)=120
sgamma(7)=719.999992, gamma(7)=720
sgamma(8)=5039.99994, gamma(8)=5040
sgamma(9)=40319.9996, gamma(9)=40320
sgamma(1)=1, gamma(1)=1
sgamma(2)=1, gamma(2)=1
sgamma(3)=2, gamma(3)=2
sgamma(4)=6, gamma(4)=6
sgamma(5)=24, gamma(5)=24
sgamma(6)=120, gamma(6)=120
sgamma(7)=720, gamma(7)=720
sgamma(8)=5040, gamma(8)=5040
sgamma(9)=40320, gamma(9)=40320