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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -4 |
| 2 | 8 |
| 3 | -118 |
| 4 | 1912 |
| 5 | 53094 |
| 6 | 7487532 |
| 7 | 722809274 |
| 8 | 92118225104 |
| 9 | 13286089862286 |
| 10 | 2227449108601940 |
| 11 | 418148868660099330 |
| 12 | 84975662262230959480 |
| 13 | 17350569219593304893078 |
| 14 | 2817250972553523348038716 |
| 15 | -252622788373980942633484214 |
[1,-4,8,-118,1912,53094,7487532,722809274, 92118225104,13286089862286,2227449108601940, 418148868660099330,84975662262230959480, 17350569219593304893078,2817250972553523348038716, -252622788373980942633484214] |