The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 13 | 13 |
| 14 | 372554 |
| 15 | 714236250 |
| 16 | 453911421600 |
| 17 | 156507084115200 |
| 18 | 36555247168352640 |
| 19 | 6528715119143118720 |
| 20 | 960135043767367104000 |
| 21 | 122086105154945279712000 |
| 22 | 13885903109630633425344000 |
| 23 | 1447862009053077400092710400 |
| 24 | 140958354488116955062668595200 |
[13,372554,714236250,453911421600,156507084115200, 36555247168352640,6528715119143118720, 960135043767367104000,122086105154945279712000, 13885903109630633425344000, 1447862009053077400092710400, 140958354488116955062668595200] |