| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 27 |
| 4 | 594 |
| 5 | 17180 |
| 6 | 603879 |
| 7 | 24795645 |
| 8 | 1160887350 |
| 9 | 60940292571 |
| 10 | 3541938123306 |
| 11 | 225669592036086 |
| 12 | 15634133444509443 |
| 13 | 1169781625911185118 |
| 14 | 93989088711427170141 |
| 15 | 8069678384570571946581 |
| 16 | 737204558292074214218778 |
[1,2,27,594,17180,603879,24795645,1160887350, 60940292571,3541938123306,225669592036086, 15634133444509443,1169781625911185118, 93989088711427170141,8069678384570571946581, 737204558292074214218778] |