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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 130 |
| 3 | 25636 |
| 4 | 28716740 |
| 5 | 236631565960 |
| 6 | 12705797338650000 |
| 7 | 4767029025189356900000 |
| 8 | 12126770507151944803953632800 |
| 9 | 212318208746951339013683682117800000 |
| 10 | 25425834059910484466764205797889644291200000 |
[5,130,25636,28716740,236631565960, 12705797338650000,4767029025189356900000, 12126770507151944803953632800, 212318208746951339013683682117800000, 25425834059910484466764205797889644291200000] |