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| n | a(n) |
|---|---|
| 2 | 23 |
| 3 | 527 |
| 4 | 12025 |
| 5 | 273695 |
| 6 | 6216581 |
| 7 | 140975467 |
[23,527,12025,273695,6216581,140975467] |