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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 610 |
| 3 | 832040 |
| 4 | 1134903170 |
| 5 | 1548008755920 |
| 6 | 2111485077978050 |
| 7 | 2880067194370816120 |
| 8 | 3928413764606871165730 |
| 9 | 5358359254990966640871840 |
| 10 | 7308805952221443105020355490 |
| 11 | 9969216677189303386214405760200 |
| 12 | 13598018856492162040239554477268290 |
[0,610,832040,1134903170,1548008755920, 2111485077978050,2880067194370816120, 3928413764606871165730,5358359254990966640871840, 7308805952221443105020355490, 9969216677189303386214405760200, 13598018856492162040239554477268290] |