n | a(n) |
---|---|
3 | 0 |
4 | 2 |
5 | 10 |
6 | 117 |
7 | 1218 |
8 | 8544 |
9 | 102528 |
10 | 1073328 |
11 | 13174560 |
12 | 167191920 |
13 | 2194456320 |
14 | 34592423040 |
15 | 566748161280 |
16 | 8894849241600 |
17 | 159020867174400 |
18 | 3016954215475200 |
19 | 59837217568128000 |
20 | 1189832713214745600 |
[0,2,10,117,1218,8544,102528,1073328,13174560, 167191920,2194456320,34592423040,566748161280, 8894849241600,159020867174400,3016954215475200, 59837217568128000,1189832713214745600] |