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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 140 |
| 3 | 924 |
| 4 | 1560 |
| 5 | 14383 |
| 6 | 18018 |
| 7 | 22770 |
| 8 | 40992 |
| 9 | 93972 |
| 10 | 139672 |
| 11 | 142310 |
| 12 | 92628 |
[6,140,924,1560,14383,18018,22770,40992,93972, 139672,142310,92628] |