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 | 600 |
| 3 | 25584 |
| 4 | 97464 |
| 5 | 826560 |
| 6 | 1249920 |
| 7 | 50725248 |
| 8 | 1372734720 |
| 9 | 702637447680 |