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 | 0 |
2 | 0 |
3 | 6 |
4 | 12 |
5 | 20 |
6 | 2550 |
7 | 20202 |
8 | 105896 |
9 | 6501672 |
10 | 111489930 |
11 | 1203491630 |
12 | 53987127612 |
13 | 1496864088876 |
14 | 27032265220142 |
15 | 1088916434686290 |
16 | 40758246253626960 |
17 | 1081683296597292752 |
18 | 44159293393817257746 |
19 | 1998309768008640244182 |
20 | 71124972575776526592740 |