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 | 0 |
| 1 | 48 |
| 2 | 4488 |
| 3 | 444888 |
| 4 | 44448888 |
| 5 | 4444488888 |
| 6 | 444444888888 |
| 7 | 44444448888888 |
| 8 | 4444444488888888 |
| 9 | 444444444888888888 |
| 10 | 44444444448888888888 |
| 11 | 4444444444488888888888 |
| 12 | 444444444444888888888888 |