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 | 2 |
| 6 | 4 |
| 7 | 8 |
| 8 | 20 |
| 9 | 58 |
| 10 | 177 |
| 11 | 630 |
| 12 | 2410 |
| 13 | 9772 |
| 14 | 41423 |
| 15 | 181586 |
| 16 | 814412 |
| 17 | 3722445 |