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| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | 410 |
| 3 | 185527 |
| 4 | 6539044 |
| 5 | 2250298051 |
| 6 | 1397942436813 |
| 7 | 56190747296833091 |
[-1,410,185527,6539044,2250298051,1397942436813, 56190747296833091] |