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 | 52 |
| 4 | 1181 |
| 5 | 109228 |
| 6 | 59707529 |
| 7 | 108229776807 |
| 8 | 486950815286291 |
| 9 | 7321785704464787533 |
| 10 | 424569942925543143564742 |