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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 6 |
| 3 | -150 |
| 4 | 3870 |
| 5 | -110670 |
| 6 | 3538500 |
| 7 | -125941284 |
| 8 | 4953759300 |
| 9 | -213744815460 |
| 10 | 10047637214010 |
| 11 | -511403305348650 |
| 12 | 28029852267603186 |
| 13 | -1646397200571955650 |
| 14 | 103190849406195456360 |
| 15 | -6875135229835376875560 |
| 16 | 485256294032090950981800 |
[0,0,6,-150,3870,-110670,3538500,-125941284, 4953759300,-213744815460,10047637214010, -511403305348650,28029852267603186, -1646397200571955650,103190849406195456360, -6875135229835376875560,485256294032090950981800] |