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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 80 |
| 3 | 853 |
| 4 | 9388 |
| 5 | 105326 |
| 6 | 1197117 |
| 7 | 13734865 |
| 8 | 158715688 |
| 9 | 1844434121 |
| 10 | 21532145438 |
| 11 | 252318496636 |
| 12 | 2966118233525 |
| 13 | 34962580152413 |
| 14 | 413079890597081 |
| 15 | 4890475172075789 |
| 16 | 58002772328563708 |
| 17 | 689032048554462015 |
| 18 | 8196897079857382577 |
| 19 | 97637481503956569960 |
| 20 | 1164360218222146935142 |
[1,8,80,853,9388,105326,1197117,13734865, 158715688,1844434121,21532145438,252318496636, 2966118233525,34962580152413,413079890597081, 4890475172075789,58002772328563708, 689032048554462015,8196897079857382577, 97637481503956569960,1164360218222146935142] |