n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 13 |
4 | 87 |
5 | 585 |
6 | 3899 |
7 | 25973 |
8 | 173039 |
9 | 1152849 |
10 | 7680691 |
11 | 51171485 |
12 | 340922567 |
13 | 2271346969 |
14 | 15132518507 |
15 | 100818201477 |
16 | 671686589663 |
17 | 4475014115745 |
18 | 29814130048611 |
19 | 198632300941357 |
20 | 1323358787022391 |
21 | 8816685256575721 |
[1,3,13,87,585,3899,25973,173039,1152849,7680691, 51171485,340922567,2271346969,15132518507, 100818201477,671686589663,4475014115745, 29814130048611,198632300941357,1323358787022391, 8816685256575721] |