n | a(n) |
---|---|
4 | 1 |
5 | 7 |
6 | 41 |
7 | 215 |
8 | 1041 |
9 | 4767 |
10 | 21001 |
11 | 90055 |
12 | 378881 |
13 | 1572527 |
14 | 6463161 |
15 | 26375895 |
16 | 107081521 |
17 | 433076287 |
18 | 1746588521 |
19 | 7029269735 |
20 | 28245956961 |
21 | 113370724047 |
22 | 454644109081 |
23 | 1822061123575 |
24 | 7298700653201 |
25 | 29226175283807 |
[1,7,41,215,1041,4767,21001,90055,378881,1572527, 6463161,26375895,107081521,433076287,1746588521, 7029269735,28245956961,113370724047,454644109081, 1822061123575,7298700653201,29226175283807] |