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 | 0 |
2 | 0 |
3 | 6 |
4 | 12 |
5 | 40 |
6 | 1260 |
7 | 11088 |
8 | 99120 |
9 | 1926720 |
10 | 32800320 |
11 | 535328640 |
12 | 11274642720 |
13 | 259872088320 |
14 | 6108539621184 |
15 | 158608655251200 |
16 | 4495317057504000 |
17 | 134114095312404480 |
18 | 4253953999500357120 |
19 | 143971794376985272320 |
20 | 5141239842495675340800 |