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 | 3 |
| 5 | 16 |
| 6 | 82 |
| 7 | 524 |
| 8 | 4372 |
| 9 | 47057 |
| 10 | 618235 |
| 11 | 9289491 |