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 | 9 |
| 2 | 15 |
| 3 | 25 |
| 4 | 25 |
| 5 | 247 |
| 6 | 583 |
| 7 | 5377 |
| 8 | 143473 |
| 9 | 143473 |
| 10 | 143473 |
| 11 | 2821813 |
| 12 | 62087033647 |
| 13 | 91450844347 |