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) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 132 |
5 | 2040 |
6 | 40440 |
7 | 979440 |
8 | 28034160 |
9 | 925858080 |
10 | 34654465440 |
11 | 1449705660480 |
12 | 67029745527360 |
13 | 3394417068282240 |
14 | 186842736763562880 |
15 | 11107390768144070400 |
16 | 709223357051739129600 |
17 | 48408150749346010022400 |
18 | 3517279496138031162739200 |
19 | 271050342684747077612160000 |