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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -12 |
| 3 | -168 |
| 4 | 8144 |
| 5 | 1384768 |
| 6 | 149032128 |
| 7 | 16299168896 |
| 8 | 2859883876608 |
| 9 | 1008997773326336 |
| 10 | 466978134769624064 |
| 11 | 228641400872390260736 |
| 12 | 120327829272472868704256 |
| 13 | 72933308761894955432460288 |
[1,0,-12,-168,8144,1384768,149032128,16299168896, 2859883876608,1008997773326336,466978134769624064, 228641400872390260736,120327829272472868704256, 72933308761894955432460288] |