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 | 3 |
| 3 | 23 |
| 4 | 347 |
| 5 | 349 |
| 6 | 311 |
| 7 | 391627 |
| 8 | 3471331 |
| 9 | 384067 |
| 10 | 2310175897 |
| 11 | 239111323273399 |
| 12 | 23167 |
| 13 | 3784097136227 |
| 14 | 235983149249 |
| 15 | 3428116271 |
| 16 | 37111677121283 |
| 17 | 23293 |
| 18 | 3471949133311 |
| 19 | 231314228398154359 |
| 20 | 378112153101159371 |
| 21 | 2379127163381 |