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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 19683 |
| 4 | 1693669888 |
| 5 | 39677989979796875 |
| 6 | 56984998629886989599887999587 |
[0,1,8,19683,1693669888,39677989979796875, 56984998629886989599887999587] |