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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 5 |
| 7 | 3 |
| 8 | 85 |
| 9 | 15 |
| 10 | 13333 |
| 11 | 1223 |
| 12 | 19434757 |
| 13 | 1495297 |
| 14 | 276013571133 |
| 15 | 18400989629 |