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 | 29 |
| 2 | 22929299 |
| 3 | 29229929 |
| 4 | 29299229 |
| 5 | 29992229 |
| 6 | 92922299 |
| 7 | 99292229 |
| 8 | 2229922999 |
| 9 | 2229929929 |
| 10 | 2229992299 |
| 11 | 2292229999 |
| 12 | 2292929299 |
| 13 | 2292999229 |
| 14 | 2299222999 |
| 15 | 2299292929 |
| 16 | 2299922929 |
| 17 | 2922929929 |
| 18 | 2922992299 |
| 19 | 2929292299 |
| 20 | 2929299229 |
| 21 | 2992299229 |
| 22 | 2992922299 |
| 23 | 2992992229 |
| 24 | 2999229229 |