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 | 43 |
| 2 | 34434343 |
| 3 | 44334343 |
| 4 | 44343433 |
| 5 | 3334344443 |
| 6 | 3343443443 |
| 7 | 3344334443 |
| 8 | 3344344343 |
| 9 | 3344434433 |
| 10 | 3433434443 |
| 11 | 3433444433 |
| 12 | 3434444333 |
| 13 | 3443343443 |
| 14 | 3444334343 |
| 15 | 4334433443 |
| 16 | 4334443433 |
| 17 | 4343444333 |
| 18 | 4344333443 |
| 19 | 4344433343 |
| 20 | 4344443333 |
| 21 | 4433343443 |
| 22 | 4433344343 |
| 23 | 4434334343 |