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 | 53 |
| 2 | 35553533 |
| 3 | 53355353 |
| 4 | 53533553 |
| 5 | 3335553553 |
| 6 | 3355335553 |
| 7 | 3355355533 |
| 8 | 3355533553 |
| 9 | 3355535353 |
| 10 | 3535355353 |
| 11 | 3553535353 |
| 12 | 3553555333 |
| 13 | 3555353353 |
| 14 | 3555353533 |
| 15 | 3555533533 |
| 16 | 5353353553 |
| 17 | 5353533553 |
| 18 | 5353553533 |
| 19 | 5355353533 |
| 20 | 5355533353 |
| 21 | 5533553353 |
| 22 | 5535535333 |