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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -5 |
| 3 | 22 |
| 4 | 9 |
| 5 | -1244 |
| 6 | 14335 |
| 7 | -79470 |
| 8 | -586943 |
| 9 | 25131304 |
| 10 | -434574909 |
| 11 | 4418399470 |
| 12 | 8524321465 |
| 13 | -1771817986548 |
| 14 | 53502570125719 |
| 15 | -1052208254769014 |
| 16 | 11804172888840705 |
| 17 | 131741085049224400 |
| 18 | -12970386000411511733 |
| 19 | 482732550618027365574 |
| 20 | -12599999790172579025879 |
[1,0,-5,22,9,-1244,14335,-79470,-586943,25131304, -434574909,4418399470,8524321465,-1771817986548, 53502570125719,-1052208254769014, 11804172888840705,131741085049224400, -12970386000411511733,482732550618027365574, -12599999790172579025879] |