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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 24 |
| 3 | 1440 |
| 4 | 181440 |
| 5 | 43545600 |
| 6 | 17882726400 |
| 7 | 11333177856000 |
| 8 | 10257397742592000 |
| 9 | 12540115964952576000 |
| 10 | 19887027595237490688000 |
| 11 | 39679473692005106319360000 |
| 12 | 97249082487667949725286400000 |
| 13 | 287164491478121796028858368000000 |
| 14 | 1005464789964467723115455053824000000 |
[0,24,1440,181440,43545600,17882726400, 11333177856000,10257397742592000, 12540115964952576000,19887027595237490688000, 39679473692005106319360000, 97249082487667949725286400000, 287164491478121796028858368000000, 1005464789964467723115455053824000000] |