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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | -7 |
| 2 | 9 |
| 3 | -176 |
| 4 | -673 |
| 5 | 1143 |
| 6 | 33201 |
| 7 | 315783 |
| 8 | 2210985 |
| 9 | 1790369 |
| 10 | 44496424 |
| 11 | 1040502519 |
| 12 | -1810005816 |
| 13 | 7445790947 |
| 14 | -134133273672 |
| 15 | -627282760902 |
| 16 | 7903957116411 |
| 17 | -22364317249111 |
| 18 | -200569974966918 |
| 19 | 510174845699733 |
| 20 | 15061484475966460 |
| 21 | 42739249663260682 |
| 22 | 758042190595492047 |
[-1,-7,9,-176,-673,1143,33201,315783,2210985, 1790369,44496424,1040502519,-1810005816, 7445790947,-134133273672,-627282760902, 7903957116411,-22364317249111,-200569974966918, 510174845699733,15061484475966460, 42739249663260682,758042190595492047] |