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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 153 |
| 3 | 11295 |
| 4 | 31968 |
| 5 | 5289300 |
| 6 | 41957514 |
| 7 | 3216919050 |
| 8 | -21009764691 |
| 9 | 2153132775315 |
| 10 | -16978376482767 |
| 11 | 1659596014366335 |
| 12 | -35929151338082922 |
| 13 | 1473739361689662990 |
| 14 | -38968782475183427016 |
| 15 | 1541715187631618436300 |
| 16 | -46858796372722560413526 |
| 17 | 1615119529247884664988030 |
[1,15,153,11295,31968,5289300,41957514,3216919050, -21009764691,2153132775315,-16978376482767, 1659596014366335,-35929151338082922, 1473739361689662990,-38968782475183427016, 1541715187631618436300,-46858796372722560413526, 1615119529247884664988030] |