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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 17 |
| 3 | 113 |
| 4 | 2801 |
| 5 | 84771 |
| 6 | 4561441 |
| 7 | 770238913 |
| 8 | 130385366497 |
| 9 | 63056004313443 |
| 10 | 61225054070593841 |
| 11 | 67267054391287018481 |
| 12 | 273872013988285333139921 |
| 13 | 1422475138861602537117455043 |
| 14 | 12376832685202654400796070741057 |