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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 33 |
| 3 | 1368 |
| 4 | 67716 |
| 5 | 3328979 |
| 6 | 164270604 |
| 7 | 8094257014 |
| 8 | 399073153303 |
| 9 | 19671060879306 |
| 10 | 969710249315342 |
| 11 | 47801400299066037 |
| 12 | 2356379708874988482 |
| 13 | 116157573684573753928 |
| 14 | 5725991875022057193833 |
| 15 | 282262740672653624738188 |
[2,33,1368,67716,3328979,164270604,8094257014, 399073153303,19671060879306,969710249315342, 47801400299066037,2356379708874988482, 116157573684573753928,5725991875022057193833, 282262740672653624738188] |