n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 102 |
6 | 562 |
7 | 3618 |
8 | 26586 |
9 | 219798 |
10 | 2018686 |
11 | 20393790 |
12 | 224750298 |
13 | 2683250082 |
14 | 34498833434 |
15 | 475237879950 |
16 | 6983085189454 |
17 | 109021986683046 |
18 | 1802213242949602 |
19 | 31447143854808378 |
20 | 577609702827987882 |
21 | 11139837273501641502 |
22 | 225075546284489412854 |
[1,1,2,6,22,102,562,3618,26586,219798,2018686, 20393790,224750298,2683250082,34498833434, 475237879950,6983085189454,109021986683046, 1802213242949602,31447143854808378, 577609702827987882,11139837273501641502, 225075546284489412854] |