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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 13 |
| 3 | 137 |
| 4 | 13711 |
| 5 | 1371113 |
| 6 | 137111329 |
| 7 | 13711132937 |
| 8 | 13711132937113 |
| 9 | 13711132937113307 |
| 10 | 13711132937113307401 |
| 11 | 13711132937113307401463 |
| 12 | 13711132937113307401463509 |
| 13 | 13711132937113307401463509541 |
| 14 | 13711132937113307401463509541701 |
[1,13,137,13711,1371113,137111329,13711132937, 13711132937113,13711132937113307, 13711132937113307401,13711132937113307401463, 13711132937113307401463509, 13711132937113307401463509541, 13711132937113307401463509541701] |