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) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 24 |
| 4 | 230 |
| 5 | 2601 |
| 6 | 32810 |
| 7 | 433855 |
| 8 | 5923677 |
| 9 | 82675193 |
| 10 | 1173878266 |