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 | 7 |
| 4 | 17 |
| 5 | 41 |
| 6 | 239 |
| 7 | 577 |
| 8 | 665857 |
| 9 | 9369319 |
| 10 | 63018038201 |
| 11 | 489133282872437279 |
| 12 | 19175002942688032928599 |
| 13 | 123426017006182806728593424683999798008235734137469123231828679 |