Find the odd man out of the following number series? 22, 26, 42, 78, 142, 244

The given number series 22, 26, 42, 78, 142, 244 follows a pattern that,

$2222 + 22 = 22 + 4 = 2626 + 42 = 26 + 16 = 4242 + 62 = 42 + 36 = 7878 + 82 = 78 + 64 = 142142 + 102 = 142 + 100 = 242$ 

Hence, the odd one in the given number series is 244.