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| n | a(n) |
|---|---|
| -2 | 1 |
| -1 | -456 |
| 0 | -39600 |
| 1 | -1516256 |
| 2 | -37547076 |
| 3 | -695294928 |
| 4 | -10390984576 |
| 5 | -131304417600 |
| 6 | -1447427871414 |
| 7 | -14232212453368 |
| 8 | -126913165432704 |
| 9 | -1039564575554400 |
| 10 | -7901386666587800 |
| 11 | -56184964286852016 |
| 12 | -376299050740397568 |
[1,-456,-39600,-1516256,-37547076,-695294928, -10390984576,-131304417600,-1447427871414, -14232212453368,-126913165432704, -1039564575554400,-7901386666587800, -56184964286852016,-376299050740397568] |