| N | a | b |
| 1 | ||
| 2 | 1 | 1 |
| 3 | 1 | 2 |
| 4 | ||
| 5 | 1 | 2 |
| 6 | 2 | 5 |
| 7 | 3 | 8 |
| 8 | 1 | 3 |
| 9 | ||
| 10 | 1 | 3 |
| 11 | 3 | 10 |
| 12 | 2 | 7 |
| 13 | 5 | 18 |
| 14 | 4 | 15 |
| 15 | 1 | 4 |
| 16 | ||
| 17 | 1 | 4 |
| 18 | 4 | 17 |
| 19 | 39 | 170 |
| 20 | 2 | 9 |
| 21 | 12 | 55 |
| 22 | 42 | 197 |
| 23 | 5 | 24 |
| 24 | 1 | 5 |
| 25 | ||
| 26 | 1 | 5 |
| 27 | 5 | 26 |
| 28 | 24 | 127 |
| 29 | 13 | 70 |
| 30 | 2 | 11 |
| 31 | 273 | 1520 |
| 32 | 3 | 17 |
| 33 | 4 | 23 |
| 34 | 6 | 35 |
| 35 | 1 | 6 |
| 36 | ||
| 37 | 1 | 6 |
| 38 | 6 | 37 |
| 39 | 4 | 25 |
| 40 | 3 | 19 |
| 41 | 5 | 32 |
| 42 | 2 | 13 |
| 43 | 531 | 3482 |
| 44 | 30 | 199 |
| 45 | 24 | 161 |
| 46 | 3588 | 24335 |
| 47 | 7 | 48 |
| 48 | 1 | 7 |
| 49 | ||
| 50 | 1 | 7 |
