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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 672 |
| 2 | 145152 |
| 3 | 8663424 |
| 4 | -337036224 |
| 5 | -6505531200 |
| 6 | 40579467264 |
| 7 | 1996981485312 |
| 8 | 25931378854080 |
| 9 | 210242562994464 |
| 10 | 1273050737441280 |
| 11 | 6245511315490944 |
| 12 | 26057670474216192 |
| 13 | 95466371280176064 |
| 14 | 314217417062264832 |
| 15 | 945050326572360960 |
| 16 | 2631525623493208512 |
| 17 | 6854684254893824832 |
[1,672,145152,8663424,-337036224,-6505531200, 40579467264,1996981485312,25931378854080, 210242562994464,1273050737441280,6245511315490944, 26057670474216192,95466371280176064, 314217417062264832,945050326572360960, 2631525623493208512,6854684254893824832] |