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 | 11 |
| 3 | 1033 |
| 4 | 1030304099 |
| 5 | 873851166316875626844153297 |
| 6 | 531723201747806346628696993678355296791302025810590916630277786972117723914960891 |