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 | 3333 |
| 2 | 13333 |
| 3 | 23333 |
| 4 | 30333 |
| 5 | 31333 |
| 6 | 32333 |
| 7 | 33033 |
| 8 | 33133 |
| 9 | 33233 |
| 10 | 33303 |
| 11 | 33313 |
| 12 | 33323 |
| 13 | 33330 |
| 14 | 33331 |
| 15 | 33332 |
| 16 | 33334 |
| 17 | 33335 |
| 18 | 33336 |
| 19 | 33337 |
| 20 | 33338 |
| 21 | 33339 |
| 22 | 33343 |
| 23 | 33353 |
| 24 | 33363 |
| 25 | 33373 |
| 26 | 33383 |
| 27 | 33393 |
| 28 | 33433 |
| 29 | 33533 |
| 30 | 33633 |
| 31 | 33733 |