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 | 7 |
| 4 | 10 |
| 5 | 26 |
| 6 | 177 |
| 7 | 508 |
| 8 | 13812 |
| 9 | 73873 |
| 10 | 4638434 |
| 11 | 4638435 |
| 12 | 1874400183 |
| 13 | 114936835817 |