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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 21 |
| 4 | 22 |
| 5 | 32 |
| 6 | 321 |
| 7 | 322 |
| 8 | 332 |
| 9 | 432 |
| 10 | 4321 |
| 11 | 4322 |
| 12 | 4332 |
| 13 | 4432 |
| 14 | 5432 |
| 15 | 54321 |
| 16 | 54322 |
| 17 | 54332 |
| 18 | 54432 |
| 19 | 55432 |
| 20 | 65432 |
| 21 | 654321 |
| 22 | 654322 |
| 23 | 654332 |
| 24 | 654432 |
| 25 | 655432 |
| 26 | 665432 |
| 27 | 765432 |
| 28 | 7654321 |
| 29 | 7654322 |
| 30 | 7654332 |
| 31 | 7654432 |
| 32 | 7655432 |
| 33 | 7665432 |
| 34 | 7765432 |
| 35 | 8765432 |