n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 16 |
6 | 46 |
7 | 176 |
8 | 722 |
9 | 2906 |
10 | 13106 |
11 | 66716 |
12 | 345676 |
13 | 1849992 |
14 | 10802156 |
15 | 66543296 |
16 | 418075036 |
17 | 2750329276 |
18 | 19145683612 |
19 | 137410493656 |
20 | 1012831509736 |
21 | 7785886770656 |
22 | 62105849642376 |
23 | 507682088621632 |
24 | 4271236045340056 |
25 | 37171085370443576 |
[1,1,1,2,6,16,46,176,722,2906,13106,66716,345676, 1849992,10802156,66543296,418075036,2750329276, 19145683612,137410493656,1012831509736, 7785886770656,62105849642376,507682088621632, 4271236045340056,37171085370443576] |