| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 60 |
| 4 | 13733 |
| 5 | 77443340533 |
| 6 | 703340569806668663530742581 |
| 7 | 29445655130242047875797696478261941465296049517922025033117465 |
[2,7,60,13733,77443340533, 703340569806668663530742581, 29445655130242047875797696478261941465296049517922\ 025033117465] |