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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 720 |
| 3 | 2882071 |
| 4 | 18754813440 |
| 5 | 153480509680141 |
| 6 | 1435747717722810960 |
| 7 | 14662732377776152127011 |
| 8 | 159330378168761744514908160 |
| 9 | 1813222281365129112322849988761 |
| 10 | 21386175398690803114094640652896720 |
| 11 | 259532087509984537826921145014495182351 |
[1,720,2882071,18754813440,153480509680141, 1435747717722810960,14662732377776152127011, 159330378168761744514908160, 1813222281365129112322849988761, 21386175398690803114094640652896720, 259532087509984537826921145014495182351] |