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 | 120 |
2 | 4790016000 |
3 | 1703748471578689536000000 |
4 | 44045334006101976766560297729172439040000000000 |
5 | 389438360216723307909581902233109465138002465491175688781168640000000000000000 |