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 | 3 |
| 3 | 9 |
| 4 | 171 |
| 5 | 3249 |
| 6 | 97641 |
| 7 | 1855179 |
| 8 | 29884473 |
| 9 | 55753011 |
| 10 | 567804987 |
| 11 | 892145817 |
| 12 | 1059307209 |