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 | 4 |
3 | 6 |
4 | 136 |
5 | 660 |
6 | 13188 |
7 | 123480 |
8 | 2584160 |
9 | 37044000 |
10 | 855658800 |
11 | 16536548160 |
12 | 428924382720 |
13 | 10358056051200 |
14 | 302474317729920 |
15 | 8701780305254400 |
16 | 284949736641177600 |
17 | 9464366170599782400 |
18 | 345224605512559518720 |
19 | 12956112412535827353600 |