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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | -8 |
| 4 | 104 |
| 5 | -1619 |
| 6 | 27437 |
| 7 | -482626 |
| 8 | 8553639 |
| 9 | -149434331 |
| 10 | 2527339944 |
| 11 | -40748011084 |
| 12 | 619534898788 |
| 13 | -8892967520397 |
| 14 | 124088656925363 |
| 15 | -1797865061490547 |
| 16 | 28140512084643142 |
| 17 | -424643873334235802 |
| 18 | 4269156014010214570 |
| 19 | 19251023484926369328 |
| 20 | -1456780704021544219838 |
[1,1,-8,104,-1619,27437,-482626,8553639, -149434331,2527339944,-40748011084,619534898788, -8892967520397,124088656925363,-1797865061490547, 28140512084643142,-424643873334235802, 4269156014010214570,19251023484926369328, -1456780704021544219838] |