n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 10 |
4 | 32 |
5 | 116 |
6 | 392 |
7 | 1352 |
8 | 4608 |
9 | 15760 |
10 | 53792 |
11 | 183712 |
12 | 627200 |
13 | 2141504 |
14 | 7311488 |
15 | 24963200 |
16 | 85229568 |
17 | 290992384 |
18 | 993509888 |
19 | 3392055808 |
20 | 11581202432 |
21 | 39540700160 |
22 | 135000393728 |
23 | 460920178688 |
24 | 1573679923200 |
25 | 5372879343616 |
[0,1,2,10,32,116,392,1352,4608,15760,53792,183712, 627200,2141504,7311488,24963200,85229568, 290992384,993509888,3392055808,11581202432, 39540700160,135000393728,460920178688, 1573679923200,5372879343616] |