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 | 28 |
| 2 | 78 |
| 3 | 2278 |
| 4 | 8778 |
| 5 | 222778 |
| 6 | 828828 |
| 7 | 887778 |
| 8 | 8272278 |
| 9 | 22227778 |
| 10 | 88278828 |
| 11 | 88877778 |
| 12 | 2222277778 |
| 13 | 2882872278 |
| 14 | 8882778828 |
| 15 | 8888777778 |
| 16 | 222222777778 |
| 17 | 888827778828 |
| 18 | 888887777778 |
| 19 | 22222227777778 |
| 20 | 88888277778828 |
| 21 | 88888877777778 |
| 22 | 228887828777278 |
| 23 | 272277272227278 |