n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 3 |
4 | 0 |
5 | 15 |
6 | 1 |
7 | 105 |
8 | 11 |
9 | 945 |
10 | 125 |
11 | 10396 |
12 | 1605 |
13 | 135159 |
14 | 23415 |
15 | 2027510 |
16 | 385036 |
17 | 34469275 |
18 | 7065807 |
19 | 654939640 |
20 | 143343650 |
21 | 13754117476 |
22 | 3188029575 |
23 | 316351767755 |
24 | 77167649440 |
25 | 7908937537525 |
26 | 2020113002916 |
27 | 213544501542750 |
28 | 56879515849403 |
29 | 6192867712389190 |
[0,1,0,3,0,15,1,105,11,945,125,10396,1605,135159, 23415,2027510,385036,34469275,7065807,654939640, 143343650,13754117476,3188029575,316351767755, 77167649440,7908937537525,2020113002916, 213544501542750,56879515849403,6192867712389190] |