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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 50 |
| 4 | 65000 |
| 5 | 43324840000 |
| 6 | 80869630778404000000 |
| 7 | 3253172252849127885819732800000000 |
| 8 | 18269693129769849495456863041081197822240000000000000 |
| 9 | 100765626147569183251176439308305100821490845652979377896592000000000000000000 |
[1,2,50,65000,43324840000,80869630778404000000, 3253172252849127885819732800000000, 18269693129769849495456863041081197822240000000000\ 000, 10076562614756918325117643930830510082149084565297\ 9377896592000000000000000000] |