n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 50 |
3 | 366 |
4 | 2760 |
5 | 21576 |
6 | 176112 |
7 | 1512720 |
8 | 13781376 |
9 | 134110080 |
10 | 1401566976 |
11 | 15780033792 |
12 | 191537187840 |
13 | 2503044135936 |
14 | 35120982067200 |
15 | 527284915992576 |
16 | 8439379765788672 |
17 | 143486382677852160 |
18 | 2582856448158007296 |
[1,7,50,366,2760,21576,176112,1512720,13781376, 134110080,1401566976,15780033792,191537187840, 2503044135936,35120982067200,527284915992576, 8439379765788672,143486382677852160, 2582856448158007296] |