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 | 3 |
| 2 | 7 |
| 3 | 23 |
| 4 | 287 |
| 5 | 291 |
| 6 | 795 |
| 7 | 2203 |
| 8 | 5711 |
| 9 | 7927 |
| 10 | 9443 |
| 11 | 10095 |
| 12 | 19071 |
| 13 | 29611 |
| 14 | 34651 |
| 15 | 51875 |
| 16 | 55343 |
| 17 | 77511 |
| 18 | 166303 |
| 19 | 233207 |