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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 5 |
| 8 | 14 |
| 9 | 50 |
| 10 | 233 |
| 11 | 1249 |
| 12 | 7595 |
| 13 | 49566 |
| 14 | 339712 |
| 15 | 2405167 |
| 16 | 17412878 |
| 17 | 127855172 |
| 18 | 947394711 |