4
You are multiplying each number in the sequence by -2. Therefore, the next number in the sequence after 32 is -64.
21
The next number in the sequence would be 23. The sequence consists of prime numbers.
33
-64
5
11
3
14
9
To get the next number in the sequence, you simply multiply by 26*2=1212*2=2424*2=4848*2=96