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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | -56 |
| 3 | -568 |
| 4 | 3016 |
| 5 | 39368 |
| 6 | -153656 |
| 7 | -2673208 |
| 8 | 7160776 |
| 9 | 178246088 |
| 10 | -280043576 |
| 11 | -11687793208 |
| 12 | 6234995656 |
| 13 | 754253760968 |
| 14 | 355214038984 |
| 15 | -47917026662968 |
| 16 | -70650725157944 |
| 17 | 2996038981272008 |
| 18 | 7517685391380424 |
| 19 | -184228809410028088 |
[1,8,-56,-568,3016,39368,-153656,-2673208,7160776, 178246088,-280043576,-11687793208,6234995656, 754253760968,355214038984,-47917026662968, -70650725157944,2996038981272008,7517685391380424, -184228809410028088] |