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 | 2 |
| 3 | 8 |
| 4 | 45 |
| 5 | 338 |
| 6 | 3178 |
| 7 | 34346 |
| 8 | 396659 |
| 9 | 4694705 |