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 | 2237 |
| 5 | 23333 |
| 6 | 223337 |
| 7 | 2233373 |
| 8 | 22323337 |
| 9 | 222335353 |
| 10 | 2232333533 |
| 11 | 22323332323 |
| 12 | 222335353337 |
| 13 | 2223337223773 |
| 14 | 22233372237737 |
| 15 | 222322375373773 |
| 16 | 2223223753737733 |
| 17 | 22232232373337353 |
| 18 | 222237322353237223 |
| 19 | 2222327532332333737 |
| 20 | 22223353533353323333 |