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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 196 |
| 5 | 1822 |
| 6 | 111350 |
| 7 | 25625864 |
| 8 | 7382868491 |
| 9 | 11381281119654 |
[1,4,6,196,1822,111350,25625864,7382868491, 11381281119654] |