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 | 0 |
| 1 | 1 |
| 2 | 22 |
| 3 | 323 |
| 4 | 42344 |
| 5 | 52344545 |
| 6 | 6234454564566 |
| 7 | 723445456456674566767 |
| 8 | 8234454564566745667678456676786788 |
| 9 | 9234454564566745667678456676786788945667678678896788989 |