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| n | a(n) |
|---|---|
| 1 | 753 |
| 2 | 2421376 |
| 3 | 6385146382 |
| 4 | 16851142959473 |
| 5 | 44545247280268585 |
| 6 | 117783697209668555853 |
[753,2421376,6385146382,16851142959473, 44545247280268585,117783697209668555853] |