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) |
|---|---|
| 0 | 11 |
| 1 | 251 |
| 2 | 14551 |
| 3 | 155581 |
| 4 | 4545551 |
| 5 | 45555581 |
| 6 | 555555881 |
| 7 | 44555555581 |
| 8 | 455555558581 |
| 9 | 5555555888551 |
| 10 | 255555555585881 |
| 11 | 14555555558558851 |
| 12 | 155555555858885551 |
| 13 | 2555555555558885851 |
| 14 | 45555555555585855881 |