The multiples of 18. Answer : 18,36,54,72,90,108,126,144,162,180,198,216,234,252,270,288,306,324,342,360,378,396,414,432,450,468,486,504,522,540,558,576,594,612,630,648,666,684,702,720,738,756,774,792,810,828,846,864,882,
hopes this helps
