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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 199 |
| 4 | 20026 |
| 5 | 7296946 |
| 6 | 10006653574 |
| 7 | 52756427071846 |
| 8 | 1080758244198360481 |
| 9 | 86574556540356639703921 |
| 10 | 27234507698931717202501389871 |
| 11 | 33749875110161915818408975272861391 |
| 12 | 165150307912136693948216143106251788630208 |
[1,1,7,199,20026,7296946,10006653574, 52756427071846,1080758244198360481, 86574556540356639703921, 27234507698931717202501389871, 33749875110161915818408975272861391, 165150307912136693948216143106251788630208] |