2 | X | 1 | = | 2 |
2 | X | 2 | = | 4 |
2 | X | 3 | = | 6 |
2 | X | 4 | = | 8 |
2 | X | 5 | = | 10 |
2 | X | 6 | = | 12 |
2 | X | 7 | = | 14 |
2 | X | 8 | = | 16 |
2 | X | 9 | = | 18 |
2 | X | 10 | = | 20 |
2 | X | 11 | = | 22 |
2 | X | 12 | = | 24 |
2 | X | 13 | = | 26 |
2 | X | 14 | = | 28 |
2 | X | 15 | = | 30 |
2 | X | 16 | = | 32 |
2 | X | 17 | = | 34 |
2 | X | 18 | = | 36 |
2 | X | 19 | = | 38 |
2 | X | 20 | = | 40 |