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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | -4 |
| 3 | -42 |
| 4 | 888 |
| 5 | -8086 |
| 6 | -115468 |
| 7 | 8863806 |
| 8 | -275344656 |
| 9 | 2488177106 |
| 10 | 369676840940 |
| 11 | -34139482063962 |
| 12 | 1691837365047912 |
| 13 | -16526563632072646 |
| 14 | -7669129653528552220 |
| 15 | 1088114395890103645710 |
| 16 | -87525176659638470236704 |
[0,2,-4,-42,888,-8086,-115468,8863806,-275344656, 2488177106,369676840940,-34139482063962, 1691837365047912,-16526563632072646, -7669129653528552220,1088114395890103645710, -87525176659638470236704] |