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) |
---|---|
2 | 1 |
3 | 2 |
4 | 21 |
5 | 204 |
6 | 2605 |
7 | 39990 |
8 | 720601 |
9 | 14913080 |
10 | 348678441 |
11 | 9090909090 |
12 | 261535698061 |
13 | 8230246567620 |
14 | 281241170407093 |
15 | 10371206370520814 |
16 | 410525522232055665 |
17 | 17361641481138401520 |
18 | 781282469559318055057 |
19 | 37275544492386193492506 |
20 | 1879498672877297909667781 |