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 | 72 |
| 4 | 1152 |
| 5 | 28800 |
| 6 | 4147200 |
| 7 | 50803200 |
| 8 | 3251404800 |
| 9 | 263363788800 |
| 10 | 26336378880000 |
| 11 | 3186701844480000 |
| 12 | 458885065605120000 |
| 13 | 77551576087265280000 |
| 14 | 15200108913103994880000 |