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) |
|---|---|
| 0 | 1 |
| 1 | 48 |
| 2 | 1600 |
| 3 | 46080 |
| 4 | 1232896 |
| 5 | 31653888 |
| 6 | 792985600 |
| 7 | 19566428160 |
| 8 | 478167433216 |
| 9 | 11613323132928 |
| 10 | 280917704704000 |
| 11 | 6777200695050240 |
| 12 | 163215697915150336 |
| 13 | 3926183399462535168 |
| 14 | 94372512377130188800 |