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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 18 |
| 7 | 37 |
| 8 | 95 |
| 9 | 212 |
| 10 | 528 |
| 11 | 1226 |
| 12 | 2936 |
| 13 | 6822 |
| 14 | 16212 |
| 15 | 38081 |
| 16 | 90717 |
| 17 | 215414 |
| 18 | 516358 |