n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 8 |
5 | 15 |
6 | 144 |
7 | 35 |
8 | 1152 |
9 | 2835 |
10 | 6400 |
11 | 6237 |
12 | 6220800 |
13 | 1001 |
14 | 609638400 |
15 | 13030875 |
16 | 1605632 |
17 | 221524875 |
18 | 21069103104 |
19 | 5773625 |
20 | 52672757760000 |
21 | 311834363841 |
22 | 39649280000 |
23 | 652017306213 |
24 | 18730002677760000 |
[1,1,2,3,8,15,144,35,1152,2835,6400,6237,6220800, 1001,609638400,13030875,1605632,221524875, 21069103104,5773625,52672757760000,311834363841, 39649280000,652017306213,18730002677760000] |