n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 3 |
7 | 17 |
8 | 33 |
9 | 77 |
10 | 271 |
11 | 971 |
12 | 3963 |
13 | 20443 |
14 | 99229 |
15 | 615963 |
16 | 4003277 |
17 | 33415251 |
18 | 283218519 |
19 | 3003051651 |
20 | 32410844251 |
21 | 438884364075 |
[1,1,1,1,1,3,17,33,77,271,971,3963,20443,99229, 615963,4003277,33415251,283218519,3003051651, 32410844251,438884364075] |