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 | 3 |
| 2 | 5 |
| 3 | 13 |
| 4 | 39 |
| 5 | 135 |
| 6 | 527 |
| 7 | 2277 |
| 8 | 10749 |
| 9 | 54905 |
| 10 | 301111 |
| 11 | 1761803 |