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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1568 |
| 2 | 410816 |
| 3 | 43381856 |
| 4 | 2485013888 |
| 5 | 90102925472 |
| 6 | 2275791199808 |
| 7 | 42760427177696 |
| 8 | 627099015232256 |
| 9 | 7446658555097888 |
| 10 | 73704171158808512 |
| 11 | 622408788864127328 |
| 12 | 4571394778282027136 |
| 13 | 29672618403243206048 |
| 14 | 172523643553950122304 |
| 15 | 908874759952534074336 |
| 16 | 4381165944112803116544 |
[1,1568,410816,43381856,2485013888,90102925472, 2275791199808,42760427177696,627099015232256, 7446658555097888,73704171158808512, 622408788864127328,4571394778282027136, 29672618403243206048,172523643553950122304, 908874759952534074336,4381165944112803116544] |