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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 99 |
| 3 | 4590 |
| 4 | 601749 |
| 5 | 223671780 |
| 6 | 236051526780 |
| 7 | 707876792166456 |
| 8 | 6035175245831686020 |
| 9 | 146337688589606021286324 |
| 10 | 10094030504239191283895044707 |
| 11 | 1981045079056219549583047340549844 |
[1,6,99,4590,601749,223671780,236051526780, 707876792166456,6035175245831686020, 146337688589606021286324, 10094030504239191283895044707, 1981045079056219549583047340549844] |