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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 352128 |
| 4 | 28021865662196736 |
| 5 | 82386976561127733213714195200 |
| 6 | 6159222400147050126331043386857585651398400 |
| 7 | 8076571943273575432916626559495058426486672272842882658769 |
[0,0,352128,28021865662196736, 82386976561127733213714195200, 6159222400147050126331043386857585651398400, 80765719432735754329166265594950584264866722728428\ 82658769] |