n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 5 |
3 | 56 |
4 | 990 |
5 | 24024 |
6 | 742560 |
7 | 27907200 |
8 | 1235591280 |
9 | 62990928000 |
10 | 3634245014400 |
11 | 234102016512000 |
12 | 16654322805120000 |
13 | 1296884927852236800 |
14 | 109720581991308288000 |
15 | 10021650950985427353600 |
16 | 982869376029609100032000 |
17 | 103017324974226408345600000 |
[0,1,5,56,990,24024,742560,27907200,1235591280, 62990928000,3634245014400,234102016512000, 16654322805120000,1296884927852236800, 109720581991308288000,10021650950985427353600, 982869376029609100032000, 103017324974226408345600000] |