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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -24 |
| 2 | -13932 |
| 3 | -3585216 |
| 4 | -1580941068 |
| 5 | -628142318640 |
| 6 | -281617154080704 |
| 7 | -126114490533924480 |
| 8 | -58596395743623957084 |
| 9 | -27537281150571923942424 |
| 10 | -13153668428658997172513880 |
| 11 | -6345860505664230715931502912 |
| 12 | -3091029995619009106117946403456 |
[1,-24,-13932,-3585216,-1580941068,-628142318640, -281617154080704,-126114490533924480, -58596395743623957084,-27537281150571923942424, -13153668428658997172513880, -6345860505664230715931502912, -3091029995619009106117946403456] |