n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 600 |
7 | 3000 |
8 | 15000 |
9 | 75000 |
10 | 375000 |
11 | 1776696 |
12 | 8208474 |
13 | 37712866 |
14 | 174397531 |
15 | 817232461 |
16 | 3852954960 |
17 | 18199500712 |
18 | 85943742360 |
19 | 405446385984 |
20 | 1911059547264 |
21 | 9001323581376 |
22 | 42375227446272 |
23 | 199427319607104 |
[1,2,6,24,120,600,3000,15000,75000,375000,1776696, 8208474,37712866,174397531,817232461,3852954960, 18199500712,85943742360,405446385984, 1911059547264,9001323581376,42375227446272, 199427319607104] |