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 | 7 |
| 2 | 53 |
| 3 | 503 |
| 4 | 1229 |
| 5 | 22637 |
| 6 | 1091401 |
| 7 | 1385203 |
| 8 | 1522841 |
| 9 | 2307467 |