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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -64 |
| 3 | -19619 |
| 4 | -16755517 |
| 5 | -30499543213 |
| 6 | -101528172949440 |
| 7 | -558442022082754554 |
| 8 | -4721800698082895269442 |
| 9 | -58144976385942395405449505 |
| 10 | -999941534906642496357956893139 |
| 11 | -23224150593200781968944997552887957 |
| 12 | -708778584588517237886357058373629079824 |
[1,-1,-64,-19619,-16755517,-30499543213, -101528172949440,-558442022082754554, -4721800698082895269442, -58144976385942395405449505, -999941534906642496357956893139, -23224150593200781968944997552887957, -708778584588517237886357058373629079824] |