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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 70 |
| 3 | 65824 |
| 4 | 1073758336 |
| 5 | 281474993496064 |
| 6 | 1180591620734591303680 |
| 7 | 79228162514264619068554215424 |
| 8 | 85070591730234615870455337878516924416 |
| 9 | 1461501637330902918203686041642102636484130504704 |
| 10 | 401734511064747568885490523085607563280607806359022338048000 |
[1,4,70,65824,1073758336,281474993496064, 1180591620734591303680, 79228162514264619068554215424, 85070591730234615870455337878516924416, 1461501637330902918203686041642102636484130504704, 40173451106474756888549052308560756328060780635902\ 2338048000] |