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 | 5 |
| 2 | 7 |
| 3 | 11 |
| 4 | 101 |
| 5 | 113 |
| 6 | 4447 |
| 7 | 111111113 |
| 8 | 555555555559 |
| 9 | 10000000000000061 |
| 10 | 111111111111111131 |
| 11 | 444444444444444469 |
| 12 | 555555555555555555619 |
| 13 | 777777777777777777777787 |
| 14 | 333333333333333333333333333333373 |
| 15 | 444444444444444444444444444444444497 |