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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 8 |
| 2 | 1051 |
| 3 | 47024 |
| 4 | 1343372 |
| 5 | 29595904 |
| 6 | 549599246 |
| 7 | 9039987264 |
| 8 | 135800368320 |
| 9 | 1901346478080 |
| 10 | 25165027679242 |
| 11 | 318105020914208 |
| 12 | 3870088369412824 |
| 13 | 45584244411107584 |
| 14 | 522235732874214800 |
| 15 | 5840992473138691072 |
| 16 | 63970901725419781632 |
| 17 | 687749464543749095424 |
| 18 | 7273214936974305201570 |
[0,8,1051,47024,1343372,29595904,549599246, 9039987264,135800368320,1901346478080, 25165027679242,318105020914208,3870088369412824, 45584244411107584,522235732874214800, 5840992473138691072,63970901725419781632, 687749464543749095424,7273214936974305201570] |