Next numbers in series

Question

What are the next two numbers in the series? 12, 15, 17, 18, 20, 24?

On what is the series based?

Answer 1

32

me base it on last 4 numbers...17,18,20,24

delta=1, 2, 4, 8,16, 32

24+8=32

Comments

Thanks for the answer, but unfortunately it is not correct. It's lower than 32. Perhaps if I gave the earlier part of the series it would help: 3, 5, 6, 9, 10, ...