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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 139 |
| 3 | 170970 |
| 4 | 36765048 |
| 5 | 19256175024 |
| 6 | 7187180809683 |
| 7 | 2362949716450873 |
| 8 | 843066901320090228 |
| 9 | 786229883043780152659 |
| 10 | 493493320537858294879619 |
| 11 | 294732734608666165262289214 |
| 12 | 146109268578429647861705542348 |
[2,139,170970,36765048,19256175024,7187180809683, 2362949716450873,843066901320090228, 786229883043780152659,493493320537858294879619, 294732734608666165262289214, 146109268578429647861705542348] |