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 | 3 |
| 2 | 4 |
| 3 | 33 |
| 4 | 34 |
| 5 | 43 |
| 6 | 44 |
| 7 | 333 |
| 8 | 334 |
| 9 | 343 |
| 10 | 344 |
| 11 | 433 |
| 12 | 434 |
| 13 | 443 |
| 14 | 444 |
| 15 | 3333 |
| 16 | 3334 |
| 17 | 3343 |
| 18 | 3344 |
| 19 | 3433 |
| 20 | 3434 |
| 21 | 3443 |
| 22 | 3444 |
| 23 | 4333 |
| 24 | 4334 |
| 25 | 4343 |
| 26 | 4344 |
| 27 | 4433 |
| 28 | 4434 |
| 29 | 4443 |
| 30 | 4444 |
| 31 | 33333 |
| 32 | 33334 |
| 33 | 33343 |
| 34 | 33344 |
| 35 | 33433 |
| 36 | 33434 |
| 37 | 33443 |
| 38 | 33444 |
| 39 | 34333 |
| 40 | 34334 |