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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 248 |
| 4 | 29561 |
| 5 | 13548425 |
| 6 | 23883950854 |
| 7 | 161892308617170 |
| 8 | 4219465347519739696 |
| 9 | 422854606293602673217071 |
| 10 | 162939915121835846953153617510 |
[1,8,248,29561,13548425,23883950854, 161892308617170,4219465347519739696, 422854606293602673217071, 162939915121835846953153617510] |