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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 1665 |
| 3 | 1497224 |
| 4 | 4485885300 |
| 5 | 34184139841800 |
| 6 | 557745681594010000 |
| 7 | 17295475176752223859200 |
| 8 | 934164847784800073360250000 |
| 9 | 82223581117536608232019062500000 |
| 10 | 11191248877703366469751902789287961600 |
[10,1665,1497224,4485885300,34184139841800, 557745681594010000,17295475176752223859200, 934164847784800073360250000, 82223581117536608232019062500000, 11191248877703366469751902789287961600] |