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 | 222222 |
| 2 | 282282 |
| 3 | 414414 |
| 4 | 444444 |
| 5 | 474474 |
| 6 | 555555 |
| 7 | 606606 |
| 8 | 636636 |
| 9 | 646646 |
| 10 | 666666 |
| 11 | 696696 |
| 12 | 828828 |
| 13 | 888888 |
| 14 | 969969 |
| 15 | 2040402 |
| 16 | 2065602 |
| 17 | 2141412 |
| 18 | 2206022 |
| 19 | 2343432 |
| 20 | 2417142 |
| 21 | 2444442 |
| 22 | 2572752 |
| 23 | 2646462 |
| 24 | 2673762 |
| 25 | 2747472 |
| 26 | 2848482 |
| 27 | 2875782 |
| 28 | 2949492 |
| 29 | 2976792 |