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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 13 |
| 3 | 162 |
| 4 | 3075 |
| 5 | 80978 |
| 6 | 2784067 |
| 7 | 119971162 |
| 8 | 6289972169 |
| 9 | 392257225754 |
| 10 | 28582571639293 |
| 11 | 2398695602082442 |
| 12 | 229094801646110203 |
| 13 | 24652935339990534970 |
| 14 | 2963620352166634246995 |
| 15 | 395067805289398293647026 |
| 16 | 58025593661340099613984593 |
| 17 | 9336949406574071339557552946 |
[1,2,13,162,3075,80978,2784067,119971162, 6289972169,392257225754,28582571639293, 2398695602082442,229094801646110203, 24652935339990534970,2963620352166634246995, 395067805289398293647026, 58025593661340099613984593, 9336949406574071339557552946] |