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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 2988 |
| 4 | 27458352 |
| 5 | 61383379820 |
| 6 | 81667937763552 |
| 7 | 85059308335953056 |
| 8 | 77970400876665940256 |
| 9 | 66589111000653219026676 |
| 10 | 54577055338226000658293040 |
| 11 | 43623618238133057304530730072 |
| 12 | 34310058645060995324654729060496 |
| 13 | 26688777245272247361239042667969036 |
[0,0,2988,27458352,61383379820,81667937763552, 85059308335953056,77970400876665940256, 66589111000653219026676, 54577055338226000658293040, 43623618238133057304530730072, 34310058645060995324654729060496, 26688777245272247361239042667969036] |