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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 2 |
| 2 | 160 |
| 3 | 140 |
| 4 | 2800 |
| 5 | 8660 |
| 6 | 62150 |
| 7 | 4085530 |
| 8 | 922820 |
| 9 | 4629490 |
| 10 | 5802710 |
| 11 | 1146175000 |
| 12 | 90894850 |
[2,2,160,140,2800,8660,62150,4085530,922820, 4629490,5802710,1146175000,90894850] |