n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 16 |
5 | 105 |
6 | 841 |
7 | 7938 |
8 | 86311 |
9 | 1062435 |
10 | 14605306 |
11 | 221790723 |
12 | 3687263581 |
13 | 66609892440 |
14 | 1299237505021 |
15 | 27213601303983 |
16 | 609223983928576 |
17 | 14516520372130245 |
18 | 366820998284761861 |
19 | 9798039716677045218 |
[1,0,1,3,16,105,841,7938,86311,1062435,14605306, 221790723,3687263581,66609892440,1299237505021, 27213601303983,609223983928576,14516520372130245, 366820998284761861,9798039716677045218] |