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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 786240 |
| 4 | 397543795824 |
| 5 | 3153491495915040 |
| 6 | 2897591335142535360 |
| 7 | 709217913680036905200 |
| 8 | 70921407068068519599840 |
| 9 | 3718329027062088400988544 |
| 10 | 119720148366778311215868480 |
| 11 | 2633253678249157711210367520 |
| 12 | 42653023518489941374251310800 |
[0,0,0,786240,397543795824,3153491495915040, 2897591335142535360,709217913680036905200, 70921407068068519599840,3718329027062088400988544, 119720148366778311215868480, 2633253678249157711210367520, 42653023518489941374251310800] |