n = 1, s = 1, num=1, den=1
n = 2, s = 5/2, num=5, den=2
n = 3, s = 13/3, num=13, den=3
n = 4, s = 77/12, num=77, den=12
n = 5, s = 87/10, num=87, den=10
nums=1, 5, 13, 77, 87
dens=1, 2, 3, 12, 10