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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 128 |
| 3 | 818 |
| 4 | 5922 |
| 5 | 40296 |
| 6 | 284428 |
| 7 | 1984001 |
| 8 | 13858979 |
| 9 | 96989344 |
| 10 | 677924227 |
| 11 | 4741556252 |
| 12 | 33160693907 |
| 13 | 231908861764 |
| 14 | 1621957375639 |
| 15 | 11343626172102 |
| 16 | 79335892155345 |
| 17 | 554866483249174 |
| 18 | 3880672405834657 |
| 19 | 27141030302203992 |
[8,128,818,5922,40296,284428,1984001,13858979, 96989344,677924227,4741556252,33160693907, 231908861764,1621957375639,11343626172102, 79335892155345,554866483249174,3880672405834657, 27141030302203992] |