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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -4 |
| 2 | 92 |
| 3 | -5216 |
| 4 | 551504 |
| 5 | -94170176 |
| 6 | 23756009664 |
| 7 | -8329952294400 |
| 8 | 3882725102061824 |
| 9 | -2324928136769545216 |
| 10 | 1740643970081187412992 |
| 11 | -1594058498088175066406912 |
| 12 | 1753510369493317462917828608 |
[1,-4,92,-5216,551504,-94170176,23756009664, -8329952294400,3882725102061824, -2324928136769545216,1740643970081187412992, -1594058498088175066406912, 1753510369493317462917828608] |