4, 12, 16, 48, 64, 192,__?

What is the next number in the series?

list the odd numbers given:

4,16,64 ---> looks like 4^n
now the evens
12, 48, 192
= 12(1, 4, 16, ..) mmmhhhh?

made up of two different sequences, the next one would belong to the odds
What do you think?