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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 5 |
| 3 | -120 |
| 4 | 6286 |
| 5 | -557991 |
| 6 | 74741031 |
| 7 | -14055359935 |
| 8 | 3529670102365 |
| 9 | -1140712320228976 |
| 10 | 461095707510195836 |
| 11 | -227895625979289345441 |
| 12 | 135204234793000554759865 |
| 13 | -94817763471081620680039785 |
| 14 | 77590302489065260867070145321 |
| 15 | -73270395178157034753637372218736 |
[1,-1,5,-120,6286,-557991,74741031,-14055359935, 3529670102365,-1140712320228976, 461095707510195836,-227895625979289345441, 135204234793000554759865, -94817763471081620680039785, 77590302489065260867070145321, -73270395178157034753637372218736] |