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 | 7 |
| 3 | 24 |
| 4 | 205 |
| 5 | 1702 |
| 6 | 16660 |
| 7 | 168453 |
| 8 | 1778878 |
| 9 | 19211780 |
| 10 | 211576925 |
| 11 | 2364602172 |
| 12 | 26755001917 |