n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 3 |
7 | 7 |
8 | 15 |
9 | 31 |
10 | 125 |
11 | 537 |
12 | 2497 |
13 | 11379 |
14 | 73403 |
15 | 564557 |
16 | 5044749 |
17 | 48150503 |
18 | 565823439 |
19 | 7944991263 |
20 | 131881718303 |
21 | 2468412664385 |
[1,1,1,1,1,3,7,15,31,125,537,2497,11379,73403, 564557,5044749,48150503,565823439,7944991263, 131881718303,2468412664385] |