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 | 10 |
| 2 | 21 |
| 3 | 122 |
| 4 | 233 |
| 5 | 1244 |
| 6 | 2345 |
| 7 | 12346 |
| 8 | 22357 |
| 9 | 32468 |
| 10 | 43569 |
| 11 | 54680 |
| 12 | 154781 |
| 13 | 255782 |
| 14 | 356793 |
| 15 | 457904 |
| 16 | 568005 |
| 17 | 679016 |
| 18 | 790117 |
| 19 | 1790128 |
| 20 | 2790239 |
| 21 | 3791240 |
| 22 | 4792351 |
| 23 | 5802362 |
| 24 | 6813363 |
| 25 | 7913364 |
| 26 | 9013465 |
| 27 | 10113576 |
| 28 | 11214587 |
| 29 | 12315688 |
| 30 | 13425689 |