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 | 2 |
| 2 | 8 |
| 3 | 64 |
| 4 | 250 |
| 5 | 1008 |
| 6 | 7005 |
| 7 | 125979 |
| 8 | 2195964 |
| 9 | 35271470 |
| 10 | 628776316 |
| 11 | 20151270950 |
| 12 | 985420227285 |
| 13 | 56533288822267 |
| 14 | 3498291331182056 |