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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 39 |
| 4 | 4180 |
| 5 | 410780 |
| 6 | 71114370 |
| 7 | 16188759706 |
| 8 | 35203970802248 |
| 9 | 150323470036510005 |
| 10 | 101010122201413121110 |
| 11 | 82142319855341886460705 |
| 12 | 86125744399762145472931164 |
| 13 | 98834976539539763693131785850 |
| 14 | 132929923088954538537350244463306 |
| 15 | 205447801545228436007113806273864240 |
[2,39,4180,410780,71114370,16188759706, 35203970802248,150323470036510005, 101010122201413121110,82142319855341886460705, 86125744399762145472931164, 98834976539539763693131785850, 132929923088954538537350244463306, 205447801545228436007113806273864240] |