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 | 2 |
2 | 6 |
3 | 20 |
4 | 81 |
5 | 408 |
6 | 2480 |
7 | 17376 |
8 | 139040 |
9 | 1251450 |
10 | 12514816 |
11 | 137663064 |
12 | 1651956992 |
13 | 21475443200 |
14 | 300656206080 |
15 | 4509843098112 |
16 | 72157489576704 |
17 | 1226677322842112 |
18 | 22080191811166208 |
19 | 419523644412176256 |
20 | 8390472888243683328 |
21 | 176199930653117513728 |