-64
You are multiplying each number in the sequence by -2. Therefore, the next number in the sequence after 32 is -64.
A single number, such as 256196144100643616 does not represent a sequence.
256
Multiply by four to get the next number.
The next number in the sequence 2, 4, 16, 64 is 256.
The next number in the sequence is... 64
-64
You are multiplying each number in the sequence by -2. Therefore, the next number in the sequence after 32 is -64.
A single number, such as 256196144100643616 does not represent a sequence.
256
Multiply by four to get the next number.
-4 +8 -16 +32 -64 +128 Next number in this sequence is 184
121
125 (the sequence is successive numbers cubed)
49
144