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 | 24 |
| 2 | 360 |
| 3 | 40320 |
| 4 | 1814400 |
| 5 | 479001600 |
| 6 | 43589145600 |
| 7 | 20922789888000 |
| 8 | 3201186852864000 |
| 9 | 2432902008176640000 |
| 10 | 562000363888803840000 |
| 11 | 620448401733239439360000 |
| 12 | 201645730563302817792000000 |
| 13 | 304888344611713860501504000000 |
| 14 | 132626429906095529318154240000000 |
| 15 | 263130836933693530167218012160000000 |