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 | 80 |
| 4 | 7300 |
| 5 | 2735828 |
| 6 | 4982424404 |
| 7 | 40668908306516 |
| 8 | 1544933702911323688 |
| 9 | 268632319882770483171376 |
| 10 | 215429706055786434110682479345 |
| 11 | 794334848116480290212387125594468856 |