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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 15 |
| 3 | 217 |
| 4 | 150851 |
| 5 | 347089704930 |
| 6 | 132276284445362589279995 |
| 7 | 18180998947336210738321894480328718385391687409 |
| 8 | 331798469448615625905863103355997674623268003125463392901012846610572765829711433817898477581 |
[2,15,217,150851,347089704930, 132276284445362589279995, 18180998947336210738321894480328718385391687409, 33179846944861562590586310335599767462326800312546\ 3392901012846610572765829711433817898477581] |