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 | 199 |
| 1 | 409 |
| 2 | 619 |
| 3 | 829 |
| 4 | 1039 |
| 5 | 1249 |
| 6 | 1459 |
| 7 | 1669 |
| 8 | 1879 |
| 9 | 2089 |