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 | 10 |
| 3 | 91 |
| 4 | 1432 |
| 5 | 23547 |
| 6 | 416177 |
| 7 | 7544247 |
| 8 | 139666895 |
| 9 | 2623895224 |