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 | 12 |
| 2 | 133 |
| 3 | 17557 |
| 4 | 308230693 |
| 5 | 95006159799029557 |
| 6 | 9026170399758739819525199160586693 |
| 7 | 81471752085480849000657595909467634426991447160798281416700808089557 |