n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 43 |
5 | 282 |
6 | 2708 |
7 | 31175 |
8 | 451701 |
9 | 7731154 |
10 | 154264825 |
11 | 3515514725 |
12 | 90381251065 |
13 | 2594105950453 |
14 | 82437061616923 |
15 | 2880328250160638 |
16 | 109987239823116870 |
17 | 4566153786442575091 |
18 | 205144850920195457266 |
19 | 9933105076082553631262 |
20 | 516439104253062357469829 |
[1,1,2,7,43,282,2708,31175,451701,7731154, 154264825,3515514725,90381251065,2594105950453, 82437061616923,2880328250160638, 109987239823116870,4566153786442575091, 205144850920195457266,9933105076082553631262, 516439104253062357469829] |