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 | 4 |
| 3 | 94 |
| 4 | 15452 |
| 5 | 15978924 |
| 6 | 107713940118 |
| 7 | 4701615485821782 |
| 8 | 1328565529272722924682 |
| 9 | 2429341045430456043662317796 |