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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | -4060 |
| 3 | -531225 |
| 4 | -16775920 |
| 5 | -244132849 |
| 6 | -2176735680 |
| 7 | -13841007265 |
| 8 | -68717797120 |
| 9 | -282419458785 |
| 10 | -999939533824 |
| 11 | -3138065579665 |
| 12 | -8913923665920 |
| 13 | -23285024428465 |
| 14 | -56615548211200 |
| 15 | -129276152906049 |
| 16 | -278653866803200 |
[1,5,-4060,-531225,-16775920,-244132849, -2176735680,-13841007265,-68717797120, -282419458785,-999939533824,-3138065579665, -8913923665920,-23285024428465,-56615548211200, -129276152906049,-278653866803200] |