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 | 1 |
2 | 2 |
3 | 7 |
4 | 28 |
5 | 140 |
6 | 850 |
7 | 5950 |
8 | 47600 |
9 | 428680 |
10 | 4286800 |
11 | 47154800 |
12 | 565873000 |
13 | 7356349000 |
14 | 102988886000 |
15 | 1544834691400 |
16 | 24717355062400 |
17 | 420195036060800 |
18 | 7563510839684800 |
19 | 143706705954011200 |
20 | 2874134119080224000 |
21 | 60356816536896880000 |
22 | 1327849963811731360000 |