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 | 4 |
| 3 | 6 |
| 4 | 86 |
| 5 | 854 |
| 6 | 9556 |
| 7 | 146168 |
| 8 | 2660326 |
| 9 | 56083228 |
| 10 | 1349544632 |
| 11 | 36786865968 |
| 12 | 1117327217782 |