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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 4662857360 |
| 8 | 54450121092072227480 |
| 9 | 1469748355306450464225368161315 |
| 10 | 111562091000778108490941203120508002739900 |
[0,0,0,0,0,1,4662857360,54450121092072227480, 1469748355306450464225368161315, 111562091000778108490941203120508002739900] |