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 | 918 |
3 | 11592504000 |
4 | 86712397842439769400000 |
5 | 3472997049383321958747830928094241894400000 |
6 | 4152034082374349458781848863476555783741415883758270213129361920000000 |