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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 16 |
| 4 | 55 |
| 5 | 327 |
| 6 | 935 |
| 7 | 382 |
| 8 | 935 |
| 9 | 9721 |
| 10 | 21505 |
| 11 | 303414 |
| 12 | 623645 |
| 13 | 14884103 |
| 14 | 29311315 |
| 15 | 818168774 |
| 16 | 1553499695 |
| 17 | 49825457361 |
| 18 | 91656482005 |
| 19 | 4526122187134 |
| 20 | 8157426898445 |
| 21 | 1035587163377863 |
| 22 | 1851735905947015 |
| 23 | 243143544972989094 |
[1,5,16,55,327,935,382,935,9721,21505,303414, 623645,14884103,29311315,818168774,1553499695, 49825457361,91656482005,4526122187134, 8157426898445,1035587163377863,1851735905947015, 243143544972989094] |