The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 360 |
| 3 | 6350400 |
| 4 | 36212520960000 |
| 5 | 117563342374788710400000 |
| 6 | 337905477880065368190647009280000000 |
| 7 | 1234818479230749311108497004714406224855040000000000 |
| 8 | 7795494015765035913020359514023640290443493305037073940480000000000000 |
[1,3,360,6350400,36212520960000, 117563342374788710400000, 337905477880065368190647009280000000, 12348184792307493111084970047144062248550400000000\ 00, 77954940157650359130203595140236402904434933050370\ 73940480000000000000] |