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 | 3 |
| 3 | 17 |
| 4 | 691 |
| 5 | 17521 |
| 6 | 824473683 |
| 7 | 19579678305 |
| 8 | 3161039281414579992004338982115 |