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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 481381 |
| 3 | 96307175477520 |
| 4 | 772712857320523525028700 |
| 5 | 105023948177499505831398834880267500 |
| 6 | 141697641014910453193894333591821632439066870000 |
[1,481381,96307175477520,772712857320523525028700, 105023948177499505831398834880267500, 141697641014910453193894333591821632439066870000] |