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 | 4 |
| 4 | 12 |
| 5 | 104 |
| 6 | 7708 |
| 7 | 42181224 |
| 8 | 1259630774324312 |
| 9 | 1123743023025850233599250718672 |
| 10 | 893151516212832508883674101518508312952543518197504822363196 |