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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 128 |
| 3 | 2532 |
| 4 | 56000 |
| 5 | 1326080 |
| 6 | 32885824 |
| 7 | 843189944 |
| 8 | 22171138432 |
| 9 | 594590989696 |
| 10 | 16200867745408 |
| 11 | 447218004699648 |
| 12 | 12480580062841856 |
| 13 | 351535051446944768 |
| 14 | 9980583165975732736 |
| 15 | 285327120847367853498 |
| 16 | 8206545372905533247648 |
| 17 | 237302661850471880634624 |
[1,8,128,2532,56000,1326080,32885824,843189944, 22171138432,594590989696,16200867745408, 447218004699648,12480580062841856, 351535051446944768,9980583165975732736, 285327120847367853498,8206545372905533247648, 237302661850471880634624] |