This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| 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 |