Question 107853
look at the differences between terms ... 3, 6, 12, 24, 48, 96
... the difference is doubling, so 2 is being raised to a sequential power


look at the terms ... 3-1, 3*2-1, 3*4-1, 3*8-1, 3*16-1, etc.
... 3*(2^0)-1, 3*(2^1)-1, 3*(2^2)-1, 3*(2^3)-1, etc.