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 | 0 |
| 3 | 8 |
| 4 | 48 |
| 5 | 88 |
| 6 | 488 |
| 7 | 888 |
| 8 | 4888 |
| 9 | 8888 |
| 10 | 48888 |
| 11 | 88888 |
| 12 | 488888 |
| 13 | 888888 |
| 14 | 4888888 |
| 15 | 8888888 |
| 16 | 48888888 |
| 17 | 88888888 |
| 18 | 488888888 |
| 19 | 888888888 |
| 20 | 4888888888 |
| 21 | 8888888888 |
| 22 | 48888888888 |
| 23 | 88888888888 |
| 24 | 488888888888 |
| 25 | 888888888888 |
| 26 | 4888888888888 |
| 27 | 8888888888888 |
| 28 | 48888888888888 |