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) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 4 |
| 6 | 9 |
| 7 | 8 |
| 8 | 55 |
| 9 | 21 |
| 10 | 104 |
| 11 | 62 |
| 12 | 429 |
| 13 | 196 |
| 14 | 800 |
| 15 | 698 |
| 16 | 4674 |
| 17 | 2070 |
| 18 | 7721 |
| 19 | 7154 |