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 | 223 |
| 2 | 227 |
| 3 | 229 |
| 4 | 2221 |
| 5 | 22229 |
| 6 | 22222223 |
| 7 | 222222227 |
| 8 | 22222222223 |
| 9 | 22222222222229 |
| 10 | 222222222222227 |
| 11 | 222222222222222221 |
| 12 | 2222222222222222222222222227 |
| 13 | 222222222222222222222222222222222223 |