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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -1 |
| 3 | -6 |
| 4 | -23 |
| 5 | -20 |
| 6 | 695 |
| 7 | 8750 |
| 8 | 59057 |
| 9 | 27096 |
| 10 | -6378545 |
| 11 | -112547358 |
| 12 | -1027909159 |
| 13 | 1643389124 |
| 14 | 273544780743 |
| 15 | 5934532973590 |
| 16 | 63673713397473 |
| 17 | -375014334859344 |
| 18 | -35324004296221921 |
| 19 | -878127940239307318 |
[1,0,-1,-6,-23,-20,695,8750,59057,27096,-6378545, -112547358,-1027909159,1643389124,273544780743, 5934532973590,63673713397473,-375014334859344, -35324004296221921,-878127940239307318] |