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 | 3 |
| 1 | 535 |
| 2 | 55355 |
| 3 | 5553555 |
| 4 | 555535555 |
| 5 | 55555355555 |
| 6 | 5555553555555 |
| 7 | 555555535555555 |
| 8 | 55555555355555555 |
| 9 | 5555555553555555555 |
| 10 | 555555555535555555555 |
| 11 | 55555555555355555555555 |
| 12 | 5555555555553555555555555 |
| 13 | 555555555555535555555555555 |
| 14 | 55555555555555355555555555555 |
| 15 | 5555555555555553555555555555555 |