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 | 2 |
| 1 | 5 |
| 2 | 11 |
| 3 | 111 |
| 4 | 12211 |
| 5 | 149096311 |
| 6 | 22229709804712411 |
| 7 | 494159998001727075769152612720511 |