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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -1 |
| 3 | 51 |
| 4 | 849 |
| 5 | -26199 |
| 6 | 1341999 |
| 7 | 82018251 |
| 8 | 18703396449 |
| 9 | -993278479599 |
| 10 | -78795859032801 |
| 11 | 38711746282537251 |
| 12 | -923351332174412751 |
| 13 | 4688204953344642495801 |
| 14 | 501271295036889289819599 |
| 15 | -89944302490128540556106949 |
| 16 | -104694993963067299023875442751 |
| 17 | 63396004159664562363095882996001 |
[1,1,-1,51,849,-26199,1341999,82018251, 18703396449,-993278479599,-78795859032801, 38711746282537251,-923351332174412751, 4688204953344642495801,501271295036889289819599, -89944302490128540556106949, -104694993963067299023875442751, 63396004159664562363095882996001] |