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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 9 |
| 11 | 45 |
| 12 | 165 |
| 13 | 495 |
| 14 | 1287 |
| 15 | 3003 |
| 16 | 6435 |
| 17 | 12870 |
| 18 | 24301 |
| 19 | 43686 |
| 20 | 75249 |
| 21 | 124809 |
| 22 | 200115 |
| 23 | 311157 |
| 24 | 470415 |
| 25 | 693000 |
| 26 | 996633 |
| 27 | 1401436 |
| 28 | 1929465 |
| 29 | 2603979 |
| 30 | 3448440 |
| 31 | 4485267 |
| 32 | 5734395 |
| 33 | 7211718 |
| 34 | 8927523 |
| 35 | 10885050 |
| 36 | 13079257 |
| 37 | 15496065 |
| 38 | 18112050 |
| 39 | 20894757 |
| 40 | 23803659 |
| 41 | 26791749 |
| 42 | 29807697 |
| 43 | 32798448 |
[1,9,45,165,495,1287,3003,6435,12870,24301,43686, 75249,124809,200115,311157,470415,693000,996633, 1401436,1929465,2603979,3448440,4485267,5734395, 7211718,8927523,10885050,13079257,15496065, 18112050,20894757,23803659,26791749,29807697, 32798448] |