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 | 40320 |
2 | 479001600 |
3 | 403291461126605635584000000 |
4 | 4274883284060025564298013753389399649690343788366813724672000000000000 |
5 | 40526919504877216755680601905432322134980384796226602145184481280000000000000 |