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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2574 |
| 3 | 100916244 |
| 4 | 3956522259690 |
| 5 | 155119411612489896 |
| 6 | 6081611647722756602886 |
| 7 | 238435666105498983760258620 |
| 8 | 9348108719250581509581942852834 |
| 9 | 366501950208502632559170667727951184 |
[0,2574,100916244,3956522259690, 155119411612489896,6081611647722756602886, 238435666105498983760258620, 9348108719250581509581942852834, 366501950208502632559170667727951184] |