Pick the odd thing out in the following.
Note: The following question follows a definite pattern. Observe the same and fill in the blank with suitable answer.
39, 155, 399, 1463, __________
ABS, CD25, EF61, GH113 , _______
24, 120, 336, 1320 , ________
6, 15, 35, 77, 143, _______
CW, EU, GS, KO, ________