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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 16 |
| 6 | 55 |
| 7 | 224 |
| 8 | 978 |
| 9 | 4507 |
| 10 | 21430 |
| 11 | 104423 |
| 12 | 517897 |
| 13 | 2606185 |
| 14 | 13272978 |