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 | 3 |
| 3 | 11 |
| 4 | 74 |
| 5 | 708 |
| 6 | 8733 |
| 7 | 131632 |
| 8 | 2342820 |
| 9 | 48068672 |
| 10 | 1116809255 |