n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 5 |
6 | 30 |
7 | 210 |
8 | 1470 |
9 | 13230 |
10 | 132300 |
11 | 1455300 |
12 | 17671500 |
13 | 229729500 |
14 | 3216213000 |
15 | 48243195000 |
16 | 771323553000 |
17 | 13112500401000 |
18 | 236025007218000 |
19 | 4484475137142000 |
20 | 89692802577378000 |
21 | 1883548854124938000 |
22 | 41438074790748636000 |
23 | 953075720187218628000 |
[0,0,0,0,1,5,30,210,1470,13230,132300,1455300, 17671500,229729500,3216213000,48243195000, 771323553000,13112500401000,236025007218000, 4484475137142000,89692802577378000, 1883548854124938000,41438074790748636000, 953075720187218628000] |