What Comes Next In The Sequence; 6, 8, 11, 15, 17, 20, ?

This simple addition series which adds 2, 3, 4 to each number to arrive at the next progressively starting with the number 6.

6 + 2 = 8

8 + 3 = 11

11 + 4 = 15

15 + 2 = 17

17 + 3 = 20

Therefore the next number will be;

20 + 4 = 24 &

24 + 2 = 26

The next 2 numbers will be = 24, 26