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 | 900 |
7 | 8568 |
8 | 80640 |
9 | 1170720 |
10 | 19625760 |
11 | 335079360 |
12 | 6259524480 |
13 | 132897697920 |
14 | 3078950434560 |
15 | 75934287475200 |
16 | 2010354982272000 |
17 | 57241482249369600 |
18 | 1735591000023336960 |
19 | 55694476130213652480 |
20 | 1889613850762113638400 |