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 | 40320 |
| 3 | 362880 |
| 4 | 479001600 |
| 5 | 20922789888000 |
| 6 | 6402373705728000 |
| 7 | 2432902008176640000 |
| 8 | 620448401733239439360000 |
| 9 | 15511210043330985984000000 |
| 10 | 10888869450418352160768000000 |