n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 114 |
5 | 1404 |
6 | 22968 |
7 | 456408 |
8 | 10762992 |
9 | 292851648 |
10 | 9038285280 |
11 | 311858347968 |
12 | 11896746473088 |
13 | 497156854363776 |
14 | 22586083785232128 |
15 | 1108320770197398528 |
16 | 58420751739908940288 |
17 | 3292054745517600648192 |
18 | 197491129333671926863872 |
19 | 12566253138627465234487296 |
[0,1,3,12,114,1404,22968,456408,10762992, 292851648,9038285280,311858347968,11896746473088, 497156854363776,22586083785232128, 1108320770197398528,58420751739908940288, 3292054745517600648192,197491129333671926863872, 12566253138627465234487296] |