n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 66 |
4 | 715 |
5 | 8398 |
6 | 104006 |
7 | 1337220 |
8 | 17678835 |
9 | 238819350 |
10 | 3282060210 |
11 | 45741281820 |
12 | 644952073662 |
13 | 9183676536076 |
14 | 131873975875180 |
15 | 1907493251046152 |
16 | 27767032438524099 |
17 | 406472021074865382 |
18 | 5979899192930226746 |
19 | 88366931393503350700 |
20 | 1311063521138246054410 |
[1,1,7,66,715,8398,104006,1337220,17678835, 238819350,3282060210,45741281820,644952073662, 9183676536076,131873975875180,1907493251046152, 27767032438524099,406472021074865382, 5979899192930226746,88366931393503350700, 1311063521138246054410] |