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 | 0 |
4 | 4 |
5 | 10 |
6 | 20 |
7 | 35 |
8 | 1736 |
9 | 15204 |
10 | 88320 |
11 | 415965 |
12 | 7632460 |
13 | 121801966 |
14 | 1368227224 |
15 | 12184672955 |
16 | 176889193040 |
17 | 3490851044360 |
18 | 59703361471296 |
19 | 837948141904569 |
20 | 13407228541467540 |
21 | 283596013866706450 |
22 | 6226093732482731800 |
23 | 121326684752194084471 |