| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 8 |
| 4 | 98 |
| 5 | 1712 |
| 6 | 58985 |
| 7 | 2541896 |
| 8 | 187337236 |
| 9 | 15687030920 |
| 10 | 2014736789165 |
| 11 | 280434300560320 |
| 12 | 55591630021883014 |
| 13 | 11642487182670742552 |
| 14 | 3294318202343411333713 |
| 15 | 969986091740868071844464 |
| 16 | 371055858906757952457992360 |
[0,1,8,98,1712,58985,2541896,187337236, 15687030920,2014736789165,280434300560320, 55591630021883014,11642487182670742552, 3294318202343411333713,969986091740868071844464, 371055858906757952457992360] |