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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 16 |
| 3 | 256 |
| 4 | 5856 |
| 5 | 175296 |
| 6 | 6486016 |
| 7 | 285756416 |
| 8 | 14606007296 |
| 9 | 849615763456 |
| 10 | 55415153442816 |
| 11 | 4005309938466816 |
| 12 | 317750919017168896 |
| 13 | 27449350209163821056 |
| 14 | 2564871898004949303296 |
| 15 | 257753802183061443444736 |
| 16 | 27720748513211258671988736 |
| 17 | 3176821722223524679312736256 |
[1,2,16,256,5856,175296,6486016,285756416, 14606007296,849615763456,55415153442816, 4005309938466816,317750919017168896, 27449350209163821056,2564871898004949303296, 257753802183061443444736, 27720748513211258671988736, 3176821722223524679312736256] |