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 | 2 |
| 4 | 7 |
| 5 | 19 |
| 6 | 240 |
| 7 | 8861 |
| 8 | 4244179 |
| 9 | 75211087198 |
| 10 | 638418558490509507 |
| 11 | 96032307742263928939148386067 |
| 12 | 122617614954666266094919182714589930973500782364 |