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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 9 |
| 3 | 13 |
| 4 | 31556 |
| 5 | 4433200001 |
| 6 | 7330164793357114944 |
| 7 | 364233003001227343654904892703798707409 |
| 8 | 30558883460500823396683989630832748682356643682219859233661160618544138815441 |
[4,9,13,31556,4433200001,7330164793357114944, 364233003001227343654904892703798707409, 30558883460500823396683989630832748682356643682219\ 859233661160618544138815441] |