n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 120 |
4 | 5250 |
5 | 395010 |
6 | 45197460 |
7 | 7299452160 |
8 | 1580682203100 |
9 | 441926274289500 |
10 | 154940341854097800 |
11 | 66565404923242024800 |
12 | 34389901168124209507800 |
13 | 21034386936107260971255000 |
14 | 15032296693671903309613950000 |
15 | 12411582569784462888618434640000 |
[1,1,6,120,5250,395010,45197460,7299452160, 1580682203100,441926274289500,154940341854097800, 66565404923242024800,34389901168124209507800, 21034386936107260971255000, 15032296693671903309613950000, 12411582569784462888618434640000] |