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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 43 |
| 4 | 324 |
| 5 | 3510 |
| 6 | 50528 |
| 7 | 913377 |
| 8 | 19918602 |
| 9 | 509040779 |
| 10 | 14918466255 |
| 11 | 493115508126 |
| 12 | 18143982947900 |
| 13 | 735340631600946 |
| 14 | 32542320101428755 |
| 15 | 1561227609244084205 |
| 16 | 80700623119099359600 |
| 17 | 4470904603875492038790 |
[1,3,9,43,324,3510,50528,913377,19918602, 509040779,14918466255,493115508126,18143982947900, 735340631600946,32542320101428755, 1561227609244084205,80700623119099359600, 4470904603875492038790] |