The First Five Terms of the Initial Value Problem $y _ { n } = y _ { n - 1 } ^ { 2 } ; y _ { 0 } = 2$

The first five terms of the initial value problem $y _ { n } = y _ { n - 1 } ^ { 2 } ; y _ { 0 } = 2$ are 2,4,8,16,and 32.