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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 85 |
| 3 | 69553 |
| 4 | 303434560 |
| 5 | 4933612230976 |
| 6 | 236578220012998656 |
| 7 | 28396321874429111046144 |
| 8 | 7558550239576242674347278336 |
| 9 | 4065590800747144716726929064984576 |
| 10 | 4105365186944970446848750402928640000000 |
| 11 | 7331569001911783916809480047177435709440000000 |
[0,1,85,69553,303434560,4933612230976, 236578220012998656,28396321874429111046144, 7558550239576242674347278336, 4065590800747144716726929064984576, 4105365186944970446848750402928640000000, 7331569001911783916809480047177435709440000000] |