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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 34650 |
| 4 | 60778746 |
| 5 | 277113842057 |
| 6 | 2730472552564105 |
| 7 | 51347486465256186884 |
[1,70,34650,60778746,277113842057, 2730472552564105,51347486465256186884] |