The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 15 |
| 2 | 120 |
| 3 | 7260 |
| 4 | 26357430 |
| 5 | 347357071281165 |
| 6 | 60328467484514345085777519195 |
| 7 | 1819761994515052295911016533077539330911500847167185483610 |
[5,15,120,7260,26357430,347357071281165, 60328467484514345085777519195, 18197619945150522959110165330775393309115008471671\ 85483610] |