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 | 179 |
| 3 | 204 |
| 4 | 108 |
| 5 | 996 |
| 6 | 2934 |
| 7 | 81720 |
| 8 | 2152080 |
| 9 | 851040 |
| 10 | 271106640 |
| 11 | 7935621120 |
| 12 | 1143137318400 |
| 13 | 52250931532800 |