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 | 5 |
| 3 | 36 |
| 4 | 254 |
| 5 | 5800 |
| 6 | 395011 |
| 7 | 38609160 |
| 8 | 5752782514 |
| 9 | 2136636243308 |
| 10 | 1857722960742588 |
| 11 | 2730521146982947356 |
| 12 | 7180017772945965801201 |