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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 928 |
| 3 | 2421 |
| 4 | 16187 |
| 5 | 87747 |
| 6 | 488944 |
| 7 | 2820436 |
| 8 | 16004647 |
| 9 | 90893514 |
| 10 | 522170664 |
| 11 | 2984588588 |
| 12 | 17090064690 |
| 13 | 97994342628 |
| 14 | 561581968676 |
| 15 | 3219331039992 |
| 16 | 18459890079828 |
| 17 | 105841123581413 |
| 18 | 606904072842495 |
| 19 | 3480160483828364 |
[8,928,2421,16187,87747,488944,2820436,16004647, 90893514,522170664,2984588588,17090064690, 97994342628,561581968676,3219331039992, 18459890079828,105841123581413,606904072842495, 3480160483828364] |