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 | 474474 |
| 4 | 555555 |
| 5 | 606606 |
| 6 | 646646 |
| 7 | 969969 |
| 8 | 2040402 |
| 9 | 2065602 |
| 10 | 2206022 |
| 11 | 2417142 |
| 12 | 2646462 |
| 13 | 2673762 |
| 14 | 2875782 |
| 15 | 3262623 |
| 16 | 3309033 |
| 17 | 4179714 |
| 18 | 4192914 |
| 19 | 4356534 |
| 20 | 4585854 |
| 21 | 4912194 |
| 22 | 5021205 |
| 23 | 5169615 |
| 24 | 5174715 |
| 25 | 5578755 |