Hi everyone it is my first question here! I would like to ask about some tricks how can we count recursive calls in a paper, without using computer? The language in example is Python 3.xx. In this example if I get larger number like 11 how can I count number of stars in this example "easily"?

```
def func(numb):
    print('*', end='')
    if numb <= 1:
        return False
    for i in range(numb):
        if func(i) and numb%i == 0:
            return False
    return True

func(11)

```

I found too uneffective, to write everything as the program running, especially if it is on a test, too time consuming.
Thank you for helping!