n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 6 |
6 | 30 |
7 | 150 |
8 | 1210230 |
9 | 32671170 |
10 | 224494620 |
11 | 1536160080 |
12 | 1482708889200 |
13 | 9918821194590 |
14 | 266029822978920 |
15 | 266029822978920 |
16 | 11358256064006271420 |
17 | 341976204789992332560 |
18 | 128642760444772214170530 |
19 | 2166703103992332274919550 |
[0,1,2,6,6,30,150,1210230,32671170,224494620, 1536160080,1482708889200,9918821194590, 266029822978920,266029822978920, 11358256064006271420,341976204789992332560, 128642760444772214170530, 2166703103992332274919550] |