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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | -15 |
| 2 | 945 |
| 3 | -14175 |
| 4 | 3274425 |
| 5 | -30405375 |
| 6 | 52996568625 |
| 7 | 2290345682625 |
| 8 | 2793516176075625 |
| 9 | 471064785877310625 |
| 10 | 385249723016564030625 |
| 11 | 141236453715527936390625 |
| 12 | 117605025896710529818265625 |
[3,-15,945,-14175,3274425,-30405375,52996568625, 2290345682625,2793516176075625,471064785877310625, 385249723016564030625,141236453715527936390625, 117605025896710529818265625] |