I'm having quite a hard time figuring out what's going wrong here:

class iterate():
    def init(self):
        self.length=1
    def iterated(self, n):
        if n==1:
            return self.length
        elif n%2==0:
            self.length+=1
            self.iterated(n/2)
        elif n!=1:
            self.length+=1
            self.iterated(3*n+1)

For example,

x=iterate()
x.iterated(5)

outputs None. It should output 6 because the length would look like this: 5 --> 16 --> 8 --> 4 --> 2 --> 1

After doing some debugging, I see that the self.length is returned properly but something goes wrong in the recursion. I'm not really sure. Thanks for any help.