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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 33156 |
| 4 | 55668310 |
| 5 | 242732516630 |
| 6 | 2284636735396701 |
| 7 | 40994714881022611899 |
[1,70,33156,55668310,242732516630, 2284636735396701,40994714881022611899] |