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 | 8 |
| 3 | 105 |
| 4 | 568 |
| 5 | 17369 |
| 6 | 21228 |
| 7 | 1195621 |
| 8 | 5510360 |
| 9 | 55084713 |
| 10 | 62758816 |
| 11 | 8292238097 |
| 12 | 8970221352 |
| 13 | 1627101870601 |
| 14 | 285889159370 |
| 15 | 87049415207 |
| 16 | 615535181394 |
| 17 | 182238338002571 |
| 18 | 276138889687610 |
| 19 | 96752636281756647 |