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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 85 |
| 3 | 217862 |
| 4 | 880915707 |
| 5 | 2723350958080 |
| 6 | 5498735029150412 |
| 7 | 6897556038713219072 |
| 8 | 6071277235712979102634 |
| 9 | 3511244471110991227215296 |
| 10 | 1503179627327417142865920896 |
| 11 | 477381405632773485831171726016 |
| 12 | 111948028342925752822983662888144 |
[1,1,85,217862,880915707,2723350958080, 5498735029150412,6897556038713219072, 6071277235712979102634,3511244471110991227215296, 1503179627327417142865920896, 477381405632773485831171726016, 111948028342925752822983662888144] |