n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 21 |
4 | 131 |
5 | 940 |
6 | 7902 |
7 | 69025 |
8 | 594203 |
9 | 4856288 |
10 | 37189863 |
11 | 265916174 |
12 | 1778005595 |
13 | 11154474602 |
14 | 65921168577 |
15 | 368463685296 |
16 | 1955231394323 |
17 | 9884229508860 |
18 | 47752849848446 |
19 | 221109815065563 |
20 | 983764137502726 |
[1,1,5,21,131,940,7902,69025,594203,4856288, 37189863,265916174,1778005595,11154474602, 65921168577,368463685296,1955231394323, 9884229508860,47752849848446,221109815065563, 983764137502726] |