What should come in place of the question mark (?) in the following number series: 4, 5, 14, 51, ?

220 162 280 216

220

The pattern of the above series is as follows: 4 x 1 + 12 = 5 5 x 2 + 22 = 14 14 x 3+ 32 = 51 51 x 4 + 42 = 220