n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 10 |
4 | 48 |
5 | 296 |
6 | 2080 |
7 | 16752 |
8 | 151424 |
9 | 1519744 |
10 | 16766208 |
11 | 201685760 |
12 | 2627316736 |
13 | 36847260672 |
14 | 553551644672 |
15 | 8868624615424 |
16 | 150943592939520 |
17 | 2719816264613888 |
18 | 51724646086475776 |
19 | 1035359388788391936 |
20 | 21759010038674358272 |
21 | 479027478333199482880 |
[0,1,2,10,48,296,2080,16752,151424,1519744, 16766208,201685760,2627316736,36847260672, 553551644672,8868624615424,150943592939520, 2719816264613888,51724646086475776, 1035359388788391936,21759010038674358272, 479027478333199482880] |