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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | -17 |
| 4 | -95 |
| 5 | -299 |
| 6 | 12241 |
| 7 | 122011 |
| 8 | 642433 |
| 9 | -41645015 |
| 10 | -597247199 |
| 11 | -4407324569 |
| 12 | 390913189921 |
| 13 | 7315513279933 |
| 14 | 69439658097265 |
| 15 | -7816418805235949 |
| 16 | -180448412456686079 |
| 17 | -2093964182367814319 |
| 18 | 285679499679525805633 |
| 19 | 7844019340520912230495 |
[1,1,1,-17,-95,-299,12241,122011,642433,-41645015, -597247199,-4407324569,390913189921,7315513279933, 69439658097265,-7816418805235949, -180448412456686079,-2093964182367814319, 285679499679525805633,7844019340520912230495] |