| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 8 |
| 3 | -16 |
| 4 | 48 |
| 5 | -160 |
| 6 | 528 |
| 7 | -1600 |
| 8 | 3952 |
| 9 | -4512 |
| 10 | -31040 |
| 11 | 322496 |
| 12 | -2021584 |
| 13 | 10452384 |
| 14 | -47768512 |
| 15 | 196396032 |
| 16 | -719709808 |
| 17 | 2244001312 |
| 18 | -5014625888 |
| 19 | -511332480 |
| 20 | 96425281504 |
| 21 | -773680460288 |
| 22 | 4504107424128 |
| 23 | -22283547559808 |
| 24 | 97629901795824 |
[1,8,8,-16,48,-160,528,-1600,3952,-4512,-31040, 322496,-2021584,10452384,-47768512,196396032, -719709808,2244001312,-5014625888,-511332480, 96425281504,-773680460288,4504107424128, -22283547559808,97629901795824] |