n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 17 |
4 | 75 |
5 | 361 |
6 | 1683 |
7 | 7937 |
8 | 37275 |
9 | 175321 |
10 | 824163 |
11 | 3875057 |
12 | 18218475 |
13 | 85655881 |
14 | 402715443 |
15 | 1893393377 |
16 | 8901903675 |
17 | 41852858041 |
18 | 196773803523 |
19 | 925144274897 |
20 | 4349623252875 |
21 | 20450023957801 |
22 | 96147057896403 |
[0,1,3,17,75,361,1683,7937,37275,175321,824163, 3875057,18218475,85655881,402715443,1893393377, 8901903675,41852858041,196773803523,925144274897, 4349623252875,20450023957801,96147057896403] |