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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 1121 |
| 4 | 1123331 |
| 5 | 11235577641 |
| 6 | 1123580257785051 |
| 7 | 1123582505161487376561 |
| 8 | 11235827298801257861061293171 |
| 9 | 1123582752351801734250808539216885881 |