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 | 233 |
| 4 | 257 |
| 5 | 277 |
| 6 | 337 |
| 7 | 353 |
| 8 | 373 |
| 9 | 523 |
| 10 | 557 |
| 11 | 577 |
| 12 | 727 |
| 13 | 733 |
| 14 | 757 |
| 15 | 773 |
| 16 | 1117 |
| 17 | 1171 |
| 18 | 4111 |