Respuesta :
Fairly certain it is a geometric sequence: this follows 2^n+1, n being the place in the sequence.
So, the first value, 4, is 2^(1+1). 8 is 2^(2+1), etc, etc.
So, the first value, 4, is 2^(1+1). 8 is 2^(2+1), etc, etc.