n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 40 |
6 | 720 |
7 | 5040 |
8 | 4480 |
9 | 362880 |
10 | 3628800 |
11 | 13305600 |
12 | 479001600 |
13 | 6227020800 |
14 | 29059430400 |
15 | 1307674368000 |
16 | 1609445376000 |
17 | 13173608448000 |
18 | 6402373705728000 |
19 | 121645100408832000 |
20 | 810967336058880000 |
21 | 4644631106519040000 |
22 | 86461594444431360000 |
[1,1,2,6,24,40,720,5040,4480,362880,3628800, 13305600,479001600,6227020800,29059430400, 1307674368000,1609445376000,13173608448000, 6402373705728000,121645100408832000, 810967336058880000,4644631106519040000, 86461594444431360000] |