8, 10, 18, 44, 124?

The pattern of the number series is as given below ;
8 + 2 = 10
10 + 8 (= 2 x 3 + 2) = 18
18 + 26(= 3 x 8 + 2) = 44
44 + 80 (= 3 x 26 + 2) = 124
124 + 424 (= 3 x 80 + 2) = 366