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| n | a(n) |
|---|---|
| 1 | 1568 |
| 2 | 63632 |
| 3 | 3684840 |
| 4 | 223396744 |
| 5 | 12890094328 |
| 6 | 754650484792 |
| 7 | 44225213151124 |
| 8 | 2584211741776292 |
| 9 | 151186144890368760 |
| 10 | 8844460675691412288 |
| 11 | 517305659727029873604 |
| 12 | 30259919841364860199036 |
| 13 | 1770035563016359258183560 |
[1568,63632,3684840,223396744,12890094328, 754650484792,44225213151124,2584211741776292, 151186144890368760,8844460675691412288, 517305659727029873604,30259919841364860199036, 1770035563016359258183560] |