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 | 1 |
| 2 | 23 |
| 3 | 299 |
| 4 | 313 |
| 5 | 171287 |
| 6 | 435705 |
| 7 | 487475 |
| 8 | 3774601 |
| 9 | 219347813 |
| 10 | 9613155161 |
| 11 | 5150163868035 |
| 12 | 37365789554345 |
| 13 | 228914067371295 |