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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2008 |
| 5 | 45934340 |
| 6 | 3875209794400 |
| 7 | 1031515670404216935 |
| 8 | 771548465309275841582080 |
| 9 | 1469748355306450464225368161315 |
| 10 | 6564303619112746449775184462681016600 |
[0,0,1,2008,45934340,3875209794400, 1031515670404216935,771548465309275841582080, 1469748355306450464225368161315, 6564303619112746449775184462681016600] |