n | a(n) |
---|---|
-1 | 0 |
0 | 2 |
1 | 7 |
2 | 19 |
3 | 47 |
4 | 111 |
5 | 255 |
6 | 575 |
7 | 1279 |
8 | 2815 |
9 | 6143 |
10 | 13311 |
11 | 28671 |
12 | 61439 |
13 | 131071 |
14 | 278527 |
15 | 589823 |
16 | 1245183 |
17 | 2621439 |
18 | 5505023 |
19 | 11534335 |
20 | 24117247 |
21 | 50331647 |
22 | 104857599 |
23 | 218103807 |
24 | 452984831 |
25 | 939524095 |
[0,2,7,19,47,111,255,575,1279,2815,6143,13311, 28671,61439,131071,278527,589823,1245183,2621439, 5505023,11534335,24117247,50331647,104857599, 218103807,452984831,939524095] |