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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 1 |
| 3 | 10 |
| 4 | 5 |
| 5 | 1 |
| 6 | 35 |
| 7 | 21 |
| 8 | 7 |
| 9 | 1 |
| 10 | 126 |
| 11 | 84 |
| 12 | 36 |
| 13 | 9 |
| 14 | 1 |
| 15 | 462 |
| 16 | 330 |
| 17 | 165 |
| 18 | 55 |
| 19 | 11 |
| 20 | 1 |
| 21 | 1716 |
| 22 | 1287 |
| 23 | 715 |
| 24 | 286 |
| 25 | 78 |
| 26 | 13 |
| 27 | 1 |
| 28 | 6435 |
| 29 | 5005 |
| 30 | 3003 |
| 31 | 1365 |
| 32 | 455 |
| 33 | 105 |
| 34 | 15 |
| 35 | 1 |
| 36 | 24310 |
| 37 | 19448 |
| 38 | 12376 |
| 39 | 6188 |
| 40 | 2380 |
| 41 | 680 |
| 42 | 136 |
| 43 | 17 |
| 44 | 1 |
| 45 | 92378 |
| 46 | 75582 |
| 47 | 50388 |
[1,3,1,10,5,1,35,21,7,1,126,84,36,9,1,462,330,165, 55,11,1,1716,1287,715,286,78,13,1,6435,5005,3003, 1365,455,105,15,1,24310,19448,12376,6188,2380,680, 136,17,1,92378,75582,50388] |