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 | 2 |
| 3 | 3 |
| 4 | 331 |
| 5 | 10831 |
| 6 | 25411 |
| 7 | 512821 |
| 8 | 512821 |
| 9 | 12960606121 |
| 10 | 434491727671 |
| 11 | 1893245380951 |
| 12 | 71023095613471 |
| 13 | 878232256181281 |