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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 13 |
| 4 | 374 |
| 5 | 1024880 |
| 6 | 1825497015565 |
| 7 | 5518297090035310527030391 |
| 8 | 42338367970038285070366947344920414892979877883695 |
| 9 | 3408489902013828249463246743444582832793944123960103541079208241885437863449854247676145413113610818 |
[2,3,13,374,1024880,1825497015565, 5518297090035310527030391, 42338367970038285070366947344920414892979877883695\ , 34084899020138282494632467434445828327939441239601\ 03541079208241885437863449854247676145413113610818\ ] |