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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 448 |
| 2 | 2138112 |
| 3 | 53551718400 |
| 4 | 4262315839979520 |
| 5 | 826978943730607718400 |
| 6 | 331594807758028302723317760 |
| 7 | 245412719115132295441404238233600 |
| 8 | 308745457206861968420290988707864903680 |
| 9 | 620129923454446057412994114512456319793889280 |
[2,448,2138112,53551718400,4262315839979520, 826978943730607718400,331594807758028302723317760, 245412719115132295441404238233600, 308745457206861968420290988707864903680, 620129923454446057412994114512456319793889280] |