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 | 6 |
| 2 | 57 |
| 3 | 723 |
| 4 | 11361 |
| 5 | 212151 |
| 6 | 4584081 |
| 7 | 112480887 |
| 8 | 3090105921 |
| 9 | 93988998183 |
| 10 | 3136338148017 |
| 11 | 113945190405303 |
| 12 | 4477940877230625 |
| 13 | 189296643095867847 |
| 14 | 8565988634172222609 |
| 15 | 413169192012610306263 |
| 16 | 21161884092470464784385 |