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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 88 |
| 3 | 375 |
| 4 | 2030 |
| 5 | 12324 |
| 6 | 71529 |
| 7 | 412094 |
| 8 | 2398145 |
| 9 | 13965762 |
| 10 | 81253079 |
| 11 | 472851402 |
| 12 | 2752482575 |
| 13 | 16022640154 |
| 14 | 93271665191 |
| 15 | 542972865898 |
| 16 | 3160919044027 |
| 17 | 18401442719156 |
| 18 | 107125485995213 |
| 19 | 623642100886430 |
| 20 | 3630605618341821 |
[8,88,375,2030,12324,71529,412094,2398145, 13965762,81253079,472851402,2752482575, 16022640154,93271665191,542972865898, 3160919044027,18401442719156,107125485995213, 623642100886430,3630605618341821] |