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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 70 |
| 3 | 125290570185 |
| 4 | 47141783957741721328080 |
| 5 | 1083265025247084674355419003777905401 |
| 6 | 778626541064162359278560268669084299553822689853360 |
[0,70,125290570185,47141783957741721328080, 1083265025247084674355419003777905401, 77862654106416235927856026866908429955382268985336\ 0] |