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) |
|---|---|
| 5 | 16 |
| 6 | 272 |
| 7 | 2880 |
| 8 | 24576 |
| 9 | 185856 |
| 10 | 1304832 |
| 11 | 8728576 |
| 12 | 56520704 |
| 13 | 357888000 |
| 14 | 2230947840 |
| 15 | 13754155008 |
| 16 | 84134068224 |
| 17 | 511780323328 |
| 18 | 3100738912256 |
| 19 | 18733264797696 |
| 20 | 112949304754176 |
| 21 | 680032201605120 |
| 22 | 4090088616099840 |
| 23 | 24582312700149760 |
| 24 | 147669797096652800 |