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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 512 |
| 3 | 47437640 |
| 4 | 98903777810704 |
| 5 | 2026535155335964884480 |
| 6 | 253839841305922000782983605664 |
| 7 | 142850870919946441196223189856661775872 |
| 8 | 290576954131557518350262914717217159752148225600 |
| 9 | 1817025580455577353700768095528219275036151622984555026720 |
[1,1,512,47437640,98903777810704, 2026535155335964884480, 253839841305922000782983605664, 142850870919946441196223189856661775872, 290576954131557518350262914717217159752148225600, 18170255804555773537007680955282192750361516229845\ 55026720] |