n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 55 |
3 | 465 |
4 | 4047 |
5 | 35673 |
6 | 316521 |
7 | 2819295 |
8 | 25173855 |
9 | 225157881 |
10 | 2016242265 |
11 | 18070920255 |
12 | 162071863425 |
13 | 1454320387575 |
14 | 13055422263255 |
15 | 117237213829953 |
16 | 1053070838993151 |
17 | 9461217421304505 |
18 | 85019389336077225 |
19 | 764113545253570191 |
20 | 6868417199986308129 |
[1,7,55,465,4047,35673,316521,2819295,25173855, 225157881,2016242265,18070920255,162071863425, 1454320387575,13055422263255,117237213829953, 1053070838993151,9461217421304505, 85019389336077225,764113545253570191, 6868417199986308129] |