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 | 6 |
5 | 0 |
6 | 90 |
7 | 180 |
8 | 90 |
9 | 1680 |
10 | 5040 |
11 | 5040 |
12 | 36330 |
13 | 138600 |
14 | 207900 |
15 | 895356 |
16 | 3818430 |
17 | 7567560 |
18 | 24720696 |
19 | 106702596 |
20 | 258053796 |
21 | 742135680 |
22 | 3050807760 |
23 | 8483450976 |
24 | 23450218506 |
25 | 89691647760 |
26 | 273414861720 |
27 | 760735601340 |
28 | 2713845780360 |
29 | 8733512193120 |
30 | 24957399366900 |