0 + 2 = 2 2 + 2 = 4 4 + 2 = 6 6 + 2 = 8 8 + 2 = 10 10 + 2 = 12 12 + 2 = 14 14 + 2 = 16 16 + 2 = 18 2, 4, 6, 8, 10, 12, 14, 16, 18