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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 181 |
| 4 | 10311 |
| 5 | 1016501 |
| 6 | 152747323 |
| 7 | 32383630189 |
| 8 | 9192184928839 |
| 9 | 3362887443335365 |
| 10 | 1540205755192368507 |
| 11 | 863047803911184565037 |
| 12 | 580733337119861320815291 |
| 13 | 462049013032247252827284109 |
[1,7,181,10311,1016501,152747323,32383630189, 9192184928839,3362887443335365, 1540205755192368507,863047803911184565037, 580733337119861320815291, 462049013032247252827284109] |