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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 8 |
| 2 | 2400 |
| 3 | 1825200 |
| 4 | 2687489280 |
| 5 | 6503780163000 |
| 6 | 23436548406180000 |
| 7 | 117725514040791821024 |
| 8 | 786292024016459316676608 |
| 9 | 6739465778247681589030301160 |
| 10 | 72110357818535214970387726284000 |
| 11 | 942092946853627620313318842336862608 |
| 12 | 14758709413836719039368938494112056160000 |
[0,8,2400,1825200,2687489280,6503780163000, 23436548406180000,117725514040791821024, 786292024016459316676608, 6739465778247681589030301160, 72110357818535214970387726284000, 942092946853627620313318842336862608, 14758709413836719039368938494112056160000] |