>>> from series4 import series4

>>> l = series4(0.1, 2)
>>> l
[7, 3, 4.33, 3.89]

>>> l = series4(0.1, 4)
>>> l
[7, 3, 4.3333, 3.8889]

>>> l = series4(0.003, 4)
>>> l
[7, 3, 4.3333, 3.8889, 4.037, 3.9877, 4.0041]

>>> l = series4(0.00003, 5)
>>> l
[7, 3, 4.33333, 3.88889, 4.03704, 3.98765, 4.00412, 3.99863, 4.00046, 3.99985, 4.00005]