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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -2 |
| 3 | 32 |
| 4 | -688 |
| 5 | 29952 |
| 6 | -1922560 |
| 7 | 160364544 |
| 8 | -19815696384 |
| 9 | 2743045259264 |
| 10 | -538516252917760 |
| 11 | 112957538226929664 |
| 12 | -31810392390007521280 |
| 13 | 9466977656209217159168 |
| 14 | -3592556624975295837896704 |
[1,-2,32,-688,29952,-1922560,160364544, -19815696384,2743045259264,-538516252917760, 112957538226929664,-31810392390007521280, 9466977656209217159168,-3592556624975295837896704] |