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 | 2 |
3 | 8 |
4 | 40 |
5 | 280 |
6 | 2240 |
7 | 20160 |
8 | 221760 |
9 | 2661120 |
10 | 37255680 |
11 | 558835200 |
12 | 8941363200 |
13 | 160944537600 |
14 | 3057946214400 |
15 | 64216870502400 |
16 | 1412771151052800 |
17 | 33906507625267200 |
18 | 847662690631680000 |
19 | 22039229956423680000 |
20 | 617098438779863040000 |
21 | 17895854724616028160000 |
22 | 554771496463096872960000 |