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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 828 |
| 3 | 508 |
| 4 | 239499435 |
| 5 | 4693095288000 |
| 6 | 561589459200 |
| 7 | 148245349824000 |
[1,828,508,239499435,4693095288000,561589459200, 148245349824000] |