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 | 6 |
| 2 | 48 |
| 3 | 480 |
| 4 | 2016 |
| 5 | 13200 |
| 6 | 26208 |
| 7 | 78336 |
| 8 | 123120 |
| 9 | 267168 |
| 10 | 682080 |
| 11 | 892800 |
| 12 | 1822176 |
| 13 | 2755200 |
| 14 | 3337488 |
| 15 | 4773696 |
| 16 | 7738848 |
| 17 | 11908560 |
| 18 | 13615200 |
| 19 | 19845936 |
| 20 | 25048800 |
| 21 | 28003968 |
| 22 | 38450880 |
| 23 | 46879728 |
| 24 | 62029440 |
| 25 | 87607296 |
| 26 | 103020000 |
| 27 | 111447648 |
| 28 | 129843216 |
| 29 | 139851360 |