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) |
---|---|
2 | 1 |
3 | 70 |
4 | 16800 |
5 | 9238320 |
6 | 9520156800 |
7 | 16305064776000 |
8 | 42856575521760000 |
9 | 163329351308323200000 |
10 | 864876880105205071104000 |
11 | 6155146233167046820024320000 |
12 | 57316399761348433188962519040000 |