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 | 5 |
| 3 | 53 |
| 4 | 353 |
| 5 | 3533 |
| 6 | 5333 |
| 7 | 33353 |
| 8 | 33533 |
| 9 | 35353 |
| 10 | 35533 |
| 11 | 53353 |
| 12 | 55333 |
| 13 | 333533 |
| 14 | 353333 |
| 15 | 533353 |
| 16 | 535333 |
| 17 | 3335533 |
| 18 | 3353333 |
| 19 | 3353533 |
| 20 | 3355553 |
| 21 | 3533533 |
| 22 | 3553553 |
| 23 | 3555353 |
| 24 | 5333353 |
| 25 | 5333533 |
| 26 | 5353553 |
| 27 | 5533553 |
| 28 | 33335333 |
| 29 | 33555553 |
| 30 | 35535553 |
| 31 | 35553533 |
| 32 | 53355353 |
| 33 | 53533553 |