n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 48 |
4 | 496 |
5 | 6251 |
6 | 92638 |
7 | 1574650 |
8 | 30150120 |
9 | 641425785 |
10 | 14999294310 |
11 | 382187185380 |
12 | 10535027302800 |
13 | 312263647871175 |
14 | 9901291024374750 |
15 | 334357521973224750 |
16 | 11978152435322073000 |
17 | 453670047374482063125 |
18 | 18110938144465399983750 |
19 | 759996114581823934815000 |
[1,1,6,48,496,6251,92638,1574650,30150120, 641425785,14999294310,382187185380,10535027302800, 312263647871175,9901291024374750, 334357521973224750,11978152435322073000, 453670047374482063125,18110938144465399983750, 759996114581823934815000] |