Collatz conjecture

l = input("Enter a number: ")
l = int(l)
i = []
def collatz(n):
    print(i) # <= print here
    if n==1:
        return i
    if n%2 == 0:
        n = n/2
        i.append(n)
        return collatz(n)
    else:
        n = ((n*3) + 1) / 2
        i.append(n)
        return collatz(n)
    print(i)
collatz(l)