n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 36 |
5 | 270 |
6 | 2520 |
7 | 28560 |
8 | 361200 |
9 | 5481000 |
10 | 88565400 |
11 | 1654052400 |
12 | 32885455680 |
13 | 721400359680 |
14 | 17024709461760 |
15 | 429108154675200 |
16 | 11721695953968000 |
17 | 333806974560259200 |
18 | 10358856500289897600 |
19 | 331148326165228091520 |
20 | 11429645706428485536000 |
21 | 407641141014720316704000 |
[1,2,6,36,270,2520,28560,361200,5481000,88565400, 1654052400,32885455680,721400359680, 17024709461760,429108154675200,11721695953968000, 333806974560259200,10358856500289897600, 331148326165228091520,11429645706428485536000, 407641141014720316704000] |