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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 254016 |
| 3 | 34558531338240 |
| 4 | 19031213036231093492121600 |
| 5 | 42863636354909175368011800612065142374400 |
| 6 | 395357821818670720302212111102866352228895870285434270515200 |
[7,254016,34558531338240, 19031213036231093492121600, 42863636354909175368011800612065142374400, 39535782181867072030221211110286635222889587028543\ 4270515200] |