n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 12 |
3 | 156 |
4 | 2360 |
5 | 41400 |
6 | 831012 |
7 | 18832576 |
8 | 476200944 |
9 | 13301078400 |
10 | 406907517500 |
11 | 13534968927744 |
12 | 486470108273448 |
13 | 18790567023993856 |
14 | 776343673316956500 |
15 | 34165751933338828800 |
16 | 1595693034061797583328 |
17 | 78831769938218360930304 |
18 | 4107393289066148637198444 |
[0,1,12,156,2360,41400,831012,18832576,476200944, 13301078400,406907517500,13534968927744, 486470108273448,18790567023993856, 776343673316956500,34165751933338828800, 1595693034061797583328,78831769938218360930304, 4107393289066148637198444] |