What will come in the place of question mark (?) in the following number series ?
The pattern is
4 + $15 \times 2^0$ = 19
19 + $15 \times 2^1$ = 49
49 + $15 \times 2^2$ = 109
109 + $15 \times 2^3$ = 229
The pattern is
4 + $15 \times 2^0$ = 19
19 + $15 \times 2^1$ = 49
49 + $15 \times 2^2$ = 109
109 + $15 \times 2^3$ = 229