What’s next in this number sequence: 6, 36, 18, 108, 54, x?

Answer 1

324

---

Series of 3a and 3b in sequence, every next nuber is equal to 3 times of previous number.（or series of *6 and /2 which gives same result)
6
36
6*3=18
36*3=108
18*3=54
108*3=324
54*3=162