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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 1 |
| 3 | 67 |
| 4 | -283 |
| 5 | -5911 |
| 6 | 269891 |
| 7 | 114551 |
| 8 | -9390523 |
| 9 | -1021798901 |
| 10 | 273468378049 |
| 11 | 3918564638257 |
| 12 | -872697935308349 |
| 13 | -131115162268691 |
| 14 | 1397912875942181 |
| 15 | 2172284899403876321 |
| 16 | -3926446823184958835813 |
| 17 | -284746035618826337921 |
| 18 | 286113629384558337084185927 |
[1,-1,1,67,-283,-5911,269891,114551,-9390523, -1021798901,273468378049,3918564638257, -872697935308349,-131115162268691, 1397912875942181,2172284899403876321, -3926446823184958835813,-284746035618826337921, 286113629384558337084185927] |