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 | 1 |
2 | 5 |
3 | 155 |
4 | 176855 |
5 | 265770796655 |
6 | 679134511201261085170655 |
7 | 4943777738415359153962876938905400001585992709055 |