What should be the next 5 terms of the series?

2 B 5 D E 8 G H I 11 K L M N 14 P Q R S T

Here, the numbers in the sequence are: 2, 5, 8, 11, 14. These numbers are increasing by 3 each time:

2 → 5 → 8 → 11 → 14 The next number will logically be 17.

Further, we see the following patter,
After the number 2, we have the letter "B".
After the number 5, we have "D E".
After the number 8, we have "G H I".
After the number 11, we have "K L M N".
After the number 14, we have "P Q R S T".

Hence, the next 5 terms will be 17 and then V, W, X, Y (as we skip the alphabet at the place of the numeric value)