n | a(n) |
---|---|
1 | 7 |
2 | 31 |
3 | 131 |
4 | 583 |
5 | 2562 |
6 | 11250 |
7 | 49471 |
8 | 217459 |
9 | 955873 |
10 | 4201865 |
11 | 18470437 |
12 | 81191949 |
13 | 356902120 |
14 | 1568863280 |
15 | 6896378669 |
16 | 30314967625 |
17 | 133257945179 |
18 | 585772685663 |
19 | 2574928188347 |
20 | 11318819287751 |
21 | 49755045854138 |
22 | 218712263620846 |
[7,31,131,583,2562,11250,49471,217459,955873, 4201865,18470437,81191949,356902120,1568863280, 6896378669,30314967625,133257945179,585772685663, 2574928188347,11318819287751,49755045854138, 218712263620846] |