n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 6 |
7 | 21 |
8 | 56 |
9 | 126 |
10 | 504 |
11 | 6006 |
12 | 67320 |
13 | 577863 |
14 | 4038034 |
15 | 24975951 |
16 | 165481680 |
17 | 1553590220 |
18 | 19495772856 |
19 | 249507077436 |
20 | 2910465717648 |
21 | 31103684847837 |
22 | 326286335505438 |
23 | 3766644374319673 |
24 | 51399738264984648 |
25 | 785038533451101930 |
[1,0,0,0,0,1,6,21,56,126,504,6006,67320,577863, 4038034,24975951,165481680,1553590220,19495772856, 249507077436,2910465717648,31103684847837, 326286335505438,3766644374319673, 51399738264984648,785038533451101930] |