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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -63 |
| 3 | 19548 |
| 4 | -16772800 |
| 5 | 30639466125 |
| 6 | -102246541593840 |
| 7 | 563353842016350448 |
| 8 | -4769009964086911303680 |
| 9 | 58776044218330627534385025 |
| 10 | -1011412682021947060157500000000 |
| 11 | 23501115057383512064004090511345788 |
| 12 | -717470258224423085595445968714004955136 |
[1,-63,19548,-16772800,30639466125, -102246541593840,563353842016350448, -4769009964086911303680, 58776044218330627534385025, -1011412682021947060157500000000, 23501115057383512064004090511345788, -717470258224423085595445968714004955136] |