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 | 3 |
| 2 | 825 |
| 3 | 1755 |
| 4 | 4641 |
| 5 | 5313 |
| 6 | 56865 |
| 7 | 58395 |
| 8 | 140049 |
| 9 | 159152763 |
| 10 | 361701435 |