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 | 2 |
| 2 | 23 |
| 3 | 223 |
| 4 | 2333 |
| 5 | 23333 |
| 6 | 222323 |
| 7 | 2222333 |
| 8 | 22222223 |
| 9 | 222323333 |
| 10 | 2222232323 |
| 11 | 22222222223 |
| 12 | 222222333323 |
| 13 | 2222222222323 |
| 14 | 22222222223323 |
| 15 | 222222222332233 |
| 16 | 2222222222323223 |
| 17 | 22222222222233323 |
| 18 | 222222222222233323 |
| 19 | 2222222222222233333 |
| 20 | 22222222222222232233 |