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| n | a(n) |
|---|---|
| 1 | 252 |
| 2 | 79796556 |
| 3 | 31091880269520 |
| 4 | 20033574566576932620 |
| 5 | 16426290801521822874931152 |
| 6 | 15872049782314898323485642439824 |
| 7 | 17207115363089145896738850914404036032 |
[252,79796556,31091880269520,20033574566576932620, 16426290801521822874931152, 15872049782314898323485642439824, 17207115363089145896738850914404036032] |