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 | 3 |
| 2 | 11 |
| 3 | 145 |
| 4 | 24721 |
| 5 | 706521601 |
| 6 | 568754681712768961 |
| 7 | 364030550787463437509470123011290881 |
| 8 | 147562413614008475146723669284672702440197339884722672618106791371480321 |