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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 107744 |
| 7 | 1861436 |
| 8 | 15977216 |
| 9 | 92868384 |
| 10 | 416136000 |
| 11 | 1589753712 |
[0,0,0,0,0,107744,1861436,15977216,92868384, 416136000,1589753712] |