14, 28, 20, 40, 32, 64, ... What number should come next?

14, 28, 20, 40, 32, 64, ... What number should come next?

Explanation

The pattern alternates between multiplying by 2 and subtracting 8:

14 × 2 = 28

28 - 8 = 20

20 × 2 = 40

40 - 8 = 32

32 × 2 = 64

64 - 8 = 56