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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 238 |
| 4 | 10588 |
| 5 | 779092 |
| 6 | 87126856 |
| 7 | 13960372312 |
| 8 | 3064747884400 |
| 9 | 890409817619536 |
| 10 | 332982388081862176 |
[1,10,238,10588,779092,87126856,13960372312, 3064747884400,890409817619536,332982388081862176] |