n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 30 |
6 | 1 |
7 | 630 |
8 | 2520 |
9 | 22680 |
10 | 1 |
11 | 1247400 |
12 | 7484400 |
13 | 97297200 |
14 | 1 |
15 | 10216206000 |
16 | 81729648000 |
17 | 1389404016000 |
18 | 1 |
19 | 237588086736000 |
20 | 2375880867360000 |
21 | 49893498214560000 |
22 | 1 |
23 | 12623055048283680000 |
24 | 151476660579404160000 |
25 | 3786916514485104000000 |
[1,1,1,3,6,30,1,630,2520,22680,1,1247400,7484400, 97297200,1,10216206000,81729648000,1389404016000, 1,237588086736000,2375880867360000, 49893498214560000,1,12623055048283680000, 151476660579404160000,3786916514485104000000] |