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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | -64 |
| 3 | 768 |
| 4 | -10240 |
| 5 | 139264 |
| 6 | -1835008 |
| 7 | 22020096 |
| 8 | -207618048 |
| 9 | 461373440 |
| 10 | 47982837760 |
| 11 | -1804154699776 |
| 12 | 47459388620800 |
| 13 | -1075356731703296 |
| 14 | 22196390985728000 |
| 15 | -425460422414434304 |
| 16 | 7596492850955550720 |
| 17 | -125084110746588020736 |
| 18 | 1842147113923814359040 |
[1,8,-64,768,-10240,139264,-1835008,22020096, -207618048,461373440,47982837760,-1804154699776, 47459388620800,-1075356731703296, 22196390985728000,-425460422414434304, 7596492850955550720,-125084110746588020736, 1842147113923814359040] |