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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 41 |
| 4 | 449 |
| 5 | 6081 |
| 6 | 98133 |
| 7 | 1846377 |
| 8 | 39888353 |
| 9 | 977117825 |
| 10 | 26839621829 |
| 11 | 818332799593 |
| 12 | 27443807417569 |
| 13 | 1004188344449473 |
| 14 | 39809506543659477 |
| 15 | 1699473112658002089 |
| 16 | 77716022374143303489 |
| 17 | 3789578550994707778305 |
| 18 | 196255782523222432943109 |
| 19 | 10756748528551996006448553 |
| 20 | 622036345094017435642828161 |
| 21 | 37846075344692579622469742529 |
[1,1,5,41,449,6081,98133,1846377,39888353, 977117825,26839621829,818332799593,27443807417569, 1004188344449473,39809506543659477, 1699473112658002089,77716022374143303489, 3789578550994707778305,196255782523222432943109, 10756748528551996006448553, 622036345094017435642828161, 37846075344692579622469742529] |