Look at collatz_seq() and give a suggestion on how to improve the function. Do not change the function.

def collatz_seq(n: int): """ Returns the Collatz sequence for a given integer n """ sequence = [] sequence.append(n) while sequence[-1] != 1: if (sequence[-1] % 2) == 0: next = sequence[-1] / 2 else: next = sequence[-1] * 3 + 1 sequence.append(next) return sequence