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 | 13 |
| 4 | 89 |
| 5 | 809 |
| 6 | 349 |
| 7 | 409 |
| 8 | 144541 |
| 9 | 10446133981 |
| 10 | 1361264878245241 |
| 11 | 4398505263882824939701 |
| 12 | 17847523009215848981 |
| 13 | 512996953133650208042047593649109478833 |