n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 9 |
6 | 23 |
7 | 125 |
8 | 821 |
9 | 6239 |
10 | 71403 |
11 | 1048093 |
12 | 19913069 |
13 | 517074745 |
14 | 17642361171 |
15 | 795865550951 |
16 | 47901047706833 |
17 | 3815017258032049 |
18 | 403246928224172293 |
19 | 56605968541991726917 |
20 | 10536114891916229568297 |
21 | 2602764408693859006627701 |
[1,1,1,3,9,23,125,821,6239,71403,1048093,19913069, 517074745,17642361171,795865550951,47901047706833, 3815017258032049,403246928224172293, 56605968541991726917,10536114891916229568297, 2602764408693859006627701] |