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 | 4 |
3 | 18 |
4 | 100 |
5 | 650 |
6 | 4908 |
7 | 41090 |
8 | 382520 |
9 | 3863808 |
10 | 42409440 |
11 | 497972112 |
12 | 6259762320 |
13 | 83343114504 |
14 | 1175904241848 |
15 | 17442325040520 |
16 | 272149555445760 |
17 | 4438451554802880 |
18 | 75714874759039104 |
19 | 1343817666163911168 |
20 | 24837691533530152320 |
21 | 475811860099666527360 |