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 | 6 |
2 | 120 |
3 | 19399380 |
4 | 195534950863140268380 |
5 | 538938984694949877040715541221415046162838700 |
6 | 216487559804430601784907786655491617909711008142914104790481010259258659171900 |