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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 506311 |
| 4 | 4761903 |
| 5 | 506767303 |
| 6 | 5517762660583 |
| 7 | 5554746531623 |
| 8 | 5555541480743 |
[4,5,506311,4761903,506767303,5517762660583, 5554746531623,5555541480743] |