n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 6 |
3 | 13 |
4 | 36 |
5 | 138 |
6 | 736 |
7 | 4908 |
8 | 36351 |
9 | 280228 |
10 | 2190651 |
11 | 17206203 |
12 | 135357481 |
13 | 1065387963 |
14 | 8387050686 |
15 | 66029196613 |
16 | 519841755036 |
17 | 4092692363058 |
18 | 32221664474776 |
19 | 253680537891828 |
20 | 1997222414704551 |
21 | 15724098193422028 |
22 | 123795561597659331 |
23 | 974640390569138163 |
[1,3,6,13,36,138,736,4908,36351,280228,2190651, 17206203,135357481,1065387963,8387050686, 66029196613,519841755036,4092692363058, 32221664474776,253680537891828,1997222414704551, 15724098193422028,123795561597659331, 974640390569138163] |