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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 8 |
| 3 | 28 |
| 4 | 1863 |
| 5 | 4400 |
| 6 | 433008 |
| 7 | 262353 |
| 8 | 352207108 |
| 9 | 379920428 |
| 10 | 18418959496 |
| 11 | 91011249895 |
| 12 | 978117768540 |
| 13 | 11516765628956 |
| 14 | 1219780690817560 |
| 15 | 708294344602810604 |
| 16 | 25852535312829023356 |
| 17 | 229222230912132985022679 |
[3,8,28,1863,4400,433008,262353,352207108, 379920428,18418959496,91011249895,978117768540, 11516765628956,1219780690817560, 708294344602810604,25852535312829023356, 229222230912132985022679] |