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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -42 |
| 2 | 924 |
| 3 | -14168 |
| 4 | 169974 |
| 5 | -1698312 |
| 6 | 14692216 |
| 7 | -112987776 |
| 8 | 787175004 |
| 9 | -5039316786 |
| 10 | 29971442424 |
| 11 | -167060546184 |
| 12 | 878920016296 |
| 13 | -4390113366408 |
| 14 | 20920981191792 |
| 15 | -95515527307648 |
| 16 | 419275600889334 |
| 17 | -1775001330567696 |
[1,-42,924,-14168,169974,-1698312,14692216, -112987776,787175004,-5039316786,29971442424, -167060546184,878920016296,-4390113366408, 20920981191792,-95515527307648,419275600889334, -1775001330567696] |