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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 73 |
| 5 | 749 |
| 6 | 12657 |
| 7 | 343693 |
| 8 | 15140923 |
| 9 | 1078147567 |
| 10 | 124268659473 |
| 11 | 23172219304577 |
| 12 | 6991754237772409 |
| 13 | 3413365649747365697 |
| 14 | 2696315730346059254139 |
| 15 | 3446235324323962173174283 |
| 16 | 7127008624714819485698797681 |
| 17 | 23848280807640171362927751869341 |
[1,1,3,11,73,749,12657,343693,15140923,1078147567, 124268659473,23172219304577,6991754237772409, 3413365649747365697,2696315730346059254139, 3446235324323962173174283, 7127008624714819485698797681, 23848280807640171362927751869341] |