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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -12 |
| 3 | -360 |
| 4 | -14000 |
| 5 | -705600 |
| 6 | -42520896 |
| 7 | -2581394816 |
| 8 | -50539790080 |
| 9 | 43910434596864 |
| 10 | 18893865109070848 |
| 11 | 6357906196273494016 |
| 12 | 1895076999147133456384 |
| 13 | 366371561754009899909120 |
| 14 | -176926962056569654501195776 |
| 15 | -397908136700956338408562851840 |
| 16 | -528899949644745117870350321778688 |
[1,0,-12,-360,-14000,-705600,-42520896, -2581394816,-50539790080,43910434596864, 18893865109070848,6357906196273494016, 1895076999147133456384,366371561754009899909120, -176926962056569654501195776, -397908136700956338408562851840, -528899949644745117870350321778688] |