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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 270 |
| 4 | 41984 |
| 5 | 30706250 |
| 6 | 94770093312 |
| 7 | 1336016204844832 |
| 8 | 76829717664330940416 |
| 9 | 19838680914222199482800274 |
| 10 | 20521247958509575370600000000000 |
| 11 | 94285013320530947020636486516362047300 |
| 12 | 1715947732437668013396578734960052732361179136 |
[1,1,8,270,41984,30706250,94770093312, 1336016204844832,76829717664330940416, 19838680914222199482800274, 20521247958509575370600000000000, 94285013320530947020636486516362047300, 1715947732437668013396578734960052732361179136] |