The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 720 |
| 2 | 262080 |
| 3 | 43243200 |
| 4 | 85765680 |
| 5 | 14366626560 |
| 6 | 27680637600 |
| 7 | 8916100427520 |
| 8 | 2871098559070560 |
| 9 | 5720836667515200 |
| 10 | 20123426048544000 |
| 11 | 924491486191094640 |
| 12 | 297683700627082714560 |
[720,262080,43243200,85765680,14366626560, 27680637600,8916100427520,2871098559070560, 5720836667515200,20123426048544000, 924491486191094640,297683700627082714560] |