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 | 2 |
2 | 3456 |
3 | 128994508800000 |
4 | 21048441369734473363614597120000000000 |
5 | 13080442484467245346116306952031286205761554346416540536012800000000000000000000 |