n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 5 |
6 | 15 |
7 | 35 |
8 | 105 |
9 | 756 |
10 | 6510 |
11 | 46530 |
12 | 289245 |
13 | 1892605 |
14 | 16187171 |
15 | 170721915 |
16 | 1833783770 |
17 | 18875258780 |
18 | 196470797580 |
19 | 2255939795436 |
20 | 29179692064545 |
21 | 401813199660285 |
22 | 5612352516200815 |
23 | 79620308330422475 |
24 | 1182881543312932386 |
[0,0,0,0,1,5,15,35,105,756,6510,46530,289245, 1892605,16187171,170721915,1833783770,18875258780, 196470797580,2255939795436,29179692064545, 401813199660285,5612352516200815, 79620308330422475,1182881543312932386] |