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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 10 |
| 11 | 63 |
| 12 | 310 |
| 13 | 1260 |
| 14 | 4423 |
| 15 | 13772 |
| 16 | 38876 |
| 17 | 101036 |
| 18 | 244770 |
| 19 | 558083 |
| 20 | 1206992 |
| 21 | 2491908 |
| 22 | 4937234 |
| 23 | 9429273 |
| 24 | 17423919 |
| 25 | 31251810 |
| 26 | 54558739 |
| 27 | 92928819 |
| 28 | 154753337 |
| 29 | 252422630 |
| 30 | 403940910 |
| 31 | 635084757 |
| 32 | 982257860 |
| 33 | 1496223663 |
[1,10,63,310,1260,4423,13772,38876,101036,244770, 558083,1206992,2491908,4937234,9429273,17423919, 31251810,54558739,92928819,154753337,252422630, 403940910,635084757,982257860,1496223663] |