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 | 4 |
| 2 | 8 |
| 3 | 58 |
| 4 | 3984 |
| 5 | 22875462 |
| 6 | 931267108879599 |
| 7 | 1031674577884217945682977326053 |
| 8 | 1260295551033259417770370489346530643885445465368122822066849 |