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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 22 |
| 4 | 219 |
| 5 | 2771 |
| 6 | 42432 |
| 7 | 762539 |
| 8 | 15736131 |
| 9 | 366842002 |
| 10 | 9536745963 |
| 11 | 273601703035 |
| 12 | 8587640290656 |
| 13 | 292752138541643 |
| 14 | 10772040284616075 |
| 15 | 425539049950420682 |
| 16 | 17963758770051942339 |
| 17 | 807032690733694275307 |
[1,3,22,219,2771,42432,762539,15736131,366842002, 9536745963,273601703035,8587640290656, 292752138541643,10772040284616075, 425539049950420682,17963758770051942339, 807032690733694275307] |