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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 31 |
| 3 | 379 |
| 4 | 8861 |
| 5 | 86183 |
| 6 | 886183 |
| 7 | 8861837 |
| 8 | 98861837 |
| 9 | 929148091 |
| 10 | 3098861837 |
| 11 | 83098861837 |
| 12 | 183098861837 |
| 13 | 8618379067153 |
| 14 | 28724068919291 |
| 15 | 830988618379067 |
| 16 | 7906715377675267 |
| 17 | 12897495334688117 |
| 18 | 675267450287240689 |
| 19 | 7675267450287240689 |
| 20 | 83098861837906715377 |
[3,31,379,8861,86183,886183,8861837,98861837, 929148091,3098861837,83098861837,183098861837, 8618379067153,28724068919291,830988618379067, 7906715377675267,12897495334688117, 675267450287240689,7675267450287240689, 83098861837906715377] |