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 | 22 |
| 2 | 777 |
| 3 | 4444 |
| 4 | 68868 |
| 5 | 200000 |
| 6 | 303030 |
| 7 | 333000 |
| 8 | 333333 |
| 9 | 555555 |
| 10 | 660000 |
| 11 | 660660 |
| 12 | 666666 |
| 13 | 700000 |
| 14 | 2332200 |
| 15 | 3131313 |
| 16 | 4444400 |
| 17 | 6060600 |
| 18 | 7007000 |
| 19 | 7700000 |
| 20 | 9009790 |
| 21 | 9656955 |
| 22 | 9885585 |
| 23 | 11517771 |
| 24 | 14233221 |
| 25 | 14331231 |
| 26 | 14333110 |
| 27 | 14411040 |
| 28 | 15143331 |
| 29 | 15233221 |
| 30 | 15331231 |
| 31 | 15333110 |