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 | 20 |
3 | 126 |
4 | 924 |
5 | 6435 |
6 | 48620 |
7 | 352716 |
8 | 2704156 |
9 | 20058300 |
10 | 155117520 |
11 | 1166803110 |
12 | 9075135300 |
13 | 68923264410 |
14 | 538257874440 |
15 | 4116715363800 |
16 | 32247603683100 |
17 | 247959266474052 |
18 | 1946939425648112 |
19 | 15033633249770520 |
20 | 118264581564861424 |