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 | 4 |
2 | 20 |
3 | 112 |
4 | 680 |
5 | 4384 |
6 | 29536 |
7 | 205440 |
8 | 1462368 |
9 | 10587520 |
10 | 77633920 |
11 | 574845440 |
12 | 4289409280 |
13 | 32206976000 |
14 | 243074083840 |
15 | 1842511532032 |
16 | 14018197145088 |
17 | 106996519311360 |
18 | 818973463721984 |
19 | 6284217844736000 |
20 | 48327723087278080 |
21 | 372397083591557120 |