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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 70 |
| 5 | 4322 |
| 6 | 5922628 |
| 7 | 263152508 |
| 8 | 2962900186 |
| 9 | 18395486320 |
| 10 | 81624918686 |
[0,70,4322,5922628,263152508,2962900186, 18395486320,81624918686] |