z=2 iter=6
z=3 iter=5
z=4 iter=1
z=1.25 iter=7
z=1.5 iter=6
z=1.75 iter=6
z=2 iter=6
z=2.25 iter=6
z=2.5 iter=6
z=2.75 iter=5
z=3 iter=5
z=3.25 iter=5
z=3.5 iter=5
z=3.75 iter=4
z=4 iter=1