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 | 81 |
| 3 | 51 |
| 4 | 291 |
| 5 | 1251 |
| 6 | 339 |
| 7 | 62499 |
| 8 | 1971 |
| 9 | 5201 |
| 10 | 5001 |
| 11 | 175781251 |
| 12 | 7299 |