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 | 720 |
| 2 | 2880 |
| 3 | 46080 |
| 4 | 25920 |
| 5 | 184320 |
| 6 | 2949120 |
| 7 | 129600 |
| 8 | 414720 |
| 9 | 11796480 |
| 10 | 1658880 |
| 11 | 188743680 |
| 12 | 3732480 |
| 13 | 2073600 |
| 14 | 26542080 |
| 15 | 12079595520 |
| 16 | 14929920 |
| 17 | 48318382080 |
| 18 | 106168320 |
| 19 | 8294400 |
| 20 | 3092376453120 |
| 21 | 1698693120 |
| 22 | 18662400 |
| 23 | 238878720 |