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 | 3 |
2 | 12 |
3 | 69 |
4 | 504 |
5 | 4440 |
6 | 45720 |
7 | 538020 |
8 | 7116480 |
9 | 104455008 |
10 | 1684005120 |
11 | 29571696000 |
12 | 561695238720 |
13 | 11472451848000 |
14 | 250694772007680 |
15 | 5835284153899200 |
16 | 144124039400140800 |
17 | 3764378233282867200 |
18 | 103661897106414366720 |
19 | 3001493647870874956800 |