n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 33 |
5 | 135 |
6 | 633 |
7 | 3207 |
8 | 17589 |
9 | 102627 |
10 | 636033 |
11 | 4161140 |
12 | 28680694 |
13 | 207317854 |
14 | 1567337840 |
15 | 12345045176 |
16 | 101012326346 |
17 | 856192424564 |
18 | 7501633169738 |
19 | 67811887289162 |
20 | 631523439500196 |
21 | 6051299254375782 |
22 | 59595920426107182 |
23 | 602637812152552784 |
24 | 6251230070001558400 |
[1,1,3,9,33,135,633,3207,17589,102627,636033, 4161140,28680694,207317854,1567337840,12345045176, 101012326346,856192424564,7501633169738, 67811887289162,631523439500196,6051299254375782, 59595920426107182,602637812152552784, 6251230070001558400] |