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| n | a(n) |
|---|---|
| 0 | 10 |
| 1 | 260 |
| 2 | 10920 |
| 3 | 633360 |
| 4 | 46868640 |
| 5 | 4218177600 |
| 6 | 447126825600 |
| 7 | 54549472723200 |
| 8 | 7527827235801600 |
| 9 | 1159285394313446400 |
| 10 | 197078517033285888000 |
| 11 | 36656604168191175168000 |
| 12 | 7404634041974617383936000 |
| 13 | 1614210221150466589698048000 |
| 14 | 377725191749209181989343232000 |
[10,260,10920,633360,46868640,4218177600, 447126825600,54549472723200,7527827235801600, 1159285394313446400,197078517033285888000, 36656604168191175168000,7404634041974617383936000, 1614210221150466589698048000, 377725191749209181989343232000] |