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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 129 |
| 4 | 3196 |
| 5 | 107465 |
| 6 | 4575966 |
| 7 | 236120059 |
| 8 | 14322901832 |
| 9 | 998966928897 |
| 10 | 78770826493210 |
| 11 | 6929685905371691 |
| 12 | 672900446143476156 |
| 13 | 71491442785783506577 |
| 14 | 8249400210035835040022 |
| 15 | 1027394346436911560475915 |
| 16 | 137360293432089585554830096 |
[1,1,8,129,3196,107465,4575966,236120059, 14322901832,998966928897,78770826493210, 6929685905371691,672900446143476156, 71491442785783506577,8249400210035835040022, 1027394346436911560475915, 137360293432089585554830096] |