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| n | a(n) |
|---|---|
| 1 | 689 |
| 2 | 3902 |
| 3 | 22262 |
| 4 | 127022 |
| 5 | 724154 |
| 6 | 4128422 |
| 7 | 23538722 |
| 8 | 134209022 |
| 9 | 765199994 |
| 10 | 4362829142 |
| 11 | 24874945682 |
| 12 | 141826072622 |
| 13 | 808630145834 |
| 14 | 4610454909062 |
| 15 | 26286795128642 |
| 16 | 149875795721822 |
| 17 | 854526159123674 |
| 18 | 4872133976736182 |
[689,3902,22262,127022,724154,4128422,23538722, 134209022,765199994,4362829142,24874945682, 141826072622,808630145834,4610454909062, 26286795128642,149875795721822,854526159123674, 4872133976736182] |