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 | 10 |
| 3 | 39 |
| 4 | 204 |
| 5 | 1262 |
| 6 | 8984 |
| 7 | 67959 |
| 8 | 544504 |
| 9 | 4535030 |
| 10 | 39004772 |
| 11 | 344217402 |
| 12 | 3103896536 |