>>> from serie import convergencia

>>> l=convergencia(0, 1, 0.01)

>>> [round(l[0], 3), round(l[1], 3), round(l[2], 3)]
[3.243, 0.056, 0.0]

>>> l2=convergencia(0, 0.5, 0.001)

>>> [round(l2[0], 3), round(l2[1], 3), round(l2[2], 3), round(l2[3], 3)]
[3.243, 1.142, 0.056, 0.0]

>>> l3=convergencia(1, 0.5, 0.01)

>>> len(l3)
2
>>> [round(l3[0], 2), round(l3[1], 2)]
[0.06, 0.0]
>>> l4=convergencia(89, 0.5, 0.01)

>>> l4
[0.0]