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) |
---|---|
1 | 4 |
2 | 108 |
3 | 337500 |
4 | 277945762500 |
5 | 79301169838123235887500 |
6 | 24018350267611933650627567399079537500 |
7 | 19868946365457062696924774946056904675112420776003728137500 |