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| n | a(n) |
|---|---|
| 19 | 34459425 |
| 20 | 76077066240 |
| 21 | 23268095463150 |
| 22 | 3502499376844800 |
| 23 | 362160710593122645 |
| 24 | 29628651314310266880 |
| 25 | 2068889029242559281900 |
| 26 | 129136429755219072614400 |
| 27 | 7428565762326237479436675 |
| 28 | 402305799817247440225075200 |
| 29 | 20831246409166627215418935750 |
[34459425,76077066240,23268095463150, 3502499376844800,362160710593122645, 29628651314310266880,2068889029242559281900, 129136429755219072614400, 7428565762326237479436675, 402305799817247440225075200, 20831246409166627215418935750] |