n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 8 |
4 | 54 |
5 | 496 |
6 | 5500 |
7 | 71952 |
8 | 1084328 |
9 | 18500480 |
10 | 352526544 |
11 | 7420540480 |
12 | 171007474528 |
13 | 4282272360192 |
14 | 115785275702720 |
15 | 3361891345761536 |
16 | 104330298643927680 |
17 | 3446150079670054912 |
18 | 120716332862675408128 |
[1,1,8,54,496,5500,71952,1084328,18500480, 352526544,7420540480,171007474528,4282272360192, 115785275702720,3361891345761536, 104330298643927680,3446150079670054912, 120716332862675408128] |