| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 12 |
| 2 | 288 |
| 3 | 17280 |
| 4 | 2073600 |
| 5 | 435456000 |
| 6 | 146313216000 |
| 7 | 73741860864000 |
| 8 | 53094139822080000 |
| 9 | 52563198423859200000 |
| 10 | 69383421919494144000000 |
| 11 | 119061952013851951104000000 |
| 12 | 260031303198252661211136000000 |
| 13 | 709885457731229765106401280000000 |
| 14 | 2385215137976932010757508300800000000 |
[2,12,288,17280,2073600,435456000,146313216000, 73741860864000,53094139822080000, 52563198423859200000,69383421919494144000000, 119061952013851951104000000, 260031303198252661211136000000, 709885457731229765106401280000000, 2385215137976932010757508300800000000] |