The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 56 |
| 3 | 1080 |
| 4 | 52416 |
| 5 | 2073600 |
| 6 | 168537600 |
| 7 | 9963233280 |
| 8 | 1122750720000 |
| 9 | 234209649623040 |
| 10 | 22056529195008000 |
| 11 | 5634088861040640000 |
| 12 | 1027073825689514803200 |
| 13 | 132063784535221862400000 |
| 14 | 27917533370401003929600000 |
[5,56,1080,52416,2073600,168537600,9963233280, 1122750720000,234209649623040,22056529195008000, 5634088861040640000,1027073825689514803200, 132063784535221862400000, 27917533370401003929600000] |