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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 265 |
| 4 | 57799 |
| 5 | 75025897 |
| 6 | 583552122727 |
| 7 | 27227375795690569 |
| 8 | 7621977131953256556295 |
| 9 | 12802009986716861649949951657 |
| 10 | 129014790439200398432389878440405671 |