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 | 0 |
1 | 1 |
2 | 1 |
3 | 6 |
4 | 16 |
5 | 70 |
6 | 264 |
7 | 1204 |
8 | 5344 |
9 | 26424 |
10 | 130960 |
11 | 698896 |
12 | 3777216 |
13 | 21576256 |
14 | 125331136 |
15 | 760604160 |
16 | 4701036544 |
17 | 30121800064 |
18 | 196619065344 |
19 | 1323267791104 |
20 | 9069634616320 |
21 | 63835247970816 |
22 | 457287705926656 |