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 | 5 |
| 2 | 26 |
| 3 | 1230 |
| 4 | 78499 |
| 5 | 455052512 |
| 6 | 37607912019 |
| 7 | 279238341033926 |
| 8 | 24739954287740861 |
| 9 | 201467286689315906291 |
| 10 | 157589269275973410412739599 |