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 | 6 |
| 3 | 24 |
| 4 | 5040 |
| 5 | 72576 |
| 6 | 39916800 |
| 7 | 95800320 |
| 8 | 1307674368000 |
| 9 | 4184557977600 |
| 10 | 121645100408832000 |
| 11 | 2043637686868377600 |
| 12 | 25852016738884976640000 |
| 13 | 238634000666630553600000 |
| 14 | 10888869450418352160768000000 |