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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -7 |
| 3 | 89 |
| 4 | -1405 |
| 5 | 24805 |
| 6 | -468958 |
| 7 | 9285898 |
| 8 | -190113771 |
| 9 | 3991746445 |
| 10 | -85484876191 |
| 11 | 1859994631209 |
| 12 | -41001506969059 |
| 13 | 913746936612503 |
| 14 | -20552899913260580 |
| 15 | 465989150086168796 |
| 16 | -10638491148102729290 |
| 17 | 244351953995837766480 |
| 18 | -5642578772157047006865 |
| 19 | 130921289778460781274315 |
| 20 | -3050692106182384617622200 |
| 21 | 71360604327670212927839280 |
| 22 | -1675070936638578659774532300 |
[1,1,-7,89,-1405,24805,-468958,9285898,-190113771, 3991746445,-85484876191,1859994631209, -41001506969059,913746936612503, -20552899913260580,465989150086168796, -10638491148102729290,244351953995837766480, -5642578772157047006865,130921289778460781274315, -3050692106182384617622200, 71360604327670212927839280, -1675070936638578659774532300] |