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 | 6 |
| 3 | 36 |
| 4 | 66 |
| 5 | 666 |
| 6 | 333336 |
| 7 | 3664664466 |
| 8 | 66336663646 |
| 9 | 3343646334464646 |
| 10 | 334446636363634446 |
| 11 | 346644344666643436 |
| 12 | 3644434346644436366346 |
| 13 | 4446663663333436343436 |
| 14 | 664333446446364463633446 |
| 15 | 436633343363366333434433646 |
| 16 | 6336363664446634343634443466 |