n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 3 |
9 | 7 |
10 | 15 |
11 | 31 |
12 | 71 |
13 | 203 |
14 | 581 |
15 | 2061 |
16 | 8089 |
17 | 33693 |
18 | 163089 |
19 | 819567 |
20 | 4807311 |
21 | 30022515 |
22 | 215155907 |
23 | 1673895429 |
[1,1,1,1,1,1,1,3,7,15,31,71,203,581,2061,8089, 33693,163089,819567,4807311,30022515,215155907, 1673895429] |