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 | 216 |
3 | 24300000 |
4 | 18010885410000000 |
5 | 9993825885714653185036703100000000000 |
6 | 16151740133123735772971793020980457559217933230000000000000 |