n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 48 |
4 | 256 |
5 | 1360 |
6 | 7056 |
7 | 36000 |
8 | 179776 |
9 | 884256 |
10 | 4276624 |
11 | 20432608 |
12 | 96353856 |
13 | 449990080 |
14 | 2080089664 |
15 | 9540782208 |
16 | 43403888896 |
17 | 196212020800 |
18 | 881112632976 |
19 | 3936117388896 |
20 | 17487049789504 |
21 | 77350773736512 |
22 | 340574032803904 |
23 | 1493986588951168 |
24 | 6528047911024896 |
[1,2,9,48,256,1360,7056,36000,179776,884256, 4276624,20432608,96353856,449990080,2080089664, 9540782208,43403888896,196212020800,881112632976, 3936117388896,17487049789504,77350773736512, 340574032803904,1493986588951168,6528047911024896] |