Find the next number in the given sequence? 11, 17, 39, 85, ?

Her the given number series is 11, 17, 39, 85, ?

$1111 + 32 - 3 = 1717 + (52 - 3) = 3939 + (72 - 3) = 8585 + (92 - 3) = 163$

Hence, the next number in the given sequence is 163.