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 | 3 |
2 | 69360 |
3 | 1522177267723200 |
4 | 391047538356893112890665992192000 |
5 | 6785985430272886334677590546861463643140253138288640000000 |