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| n | a(n) |
|---|---|
| 0 | 6 |
| 1 | 30240 |
| 2 | 1207084032000 |
| 3 | 1578472848668491776000000 |
| 4 | 192013488168893760607534429765632000000000 |
| 5 | 4963935910233933921764132479991824059486720994836480000000000000 |
[6,30240,1207084032000,1578472848668491776000000, 192013488168893760607534429765632000000000, 49639359102339339217641324799918240594867209948364\ 80000000000000] |