n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 13 |
3 | 63 |
4 | 319 |
5 | 1647 |
6 | 8583 |
7 | 44941 |
8 | 235913 |
9 | 1240173 |
10 | 6524919 |
11 | 34346785 |
12 | 180855499 |
13 | 952494047 |
14 | 5017037457 |
15 | 26428222177 |
16 | 139223327493 |
17 | 733452042061 |
18 | 3864043260671 |
19 | 20357263645411 |
20 | 107251092223601 |
21 | 565050705077767 |
[1,3,13,63,319,1647,8583,44941,235913,1240173, 6524919,34346785,180855499,952494047,5017037457, 26428222177,139223327493,733452042061, 3864043260671,20357263645411,107251092223601, 565050705077767] |