n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 31 |
4 | 256 |
5 | 2960 |
6 | 44169 |
7 | 813298 |
8 | 17952898 |
9 | 465148507 |
10 | 13915349132 |
11 | 474372594032 |
12 | 18228772272441 |
13 | 782443669319410 |
14 | 37224994809379094 |
15 | 1949799331997896119 |
16 | 111783178753323665728 |
17 | 6978369826387194664144 |
18 | 472207139326449254997425 |
[1,2,6,31,256,2960,44169,813298,17952898, 465148507,13915349132,474372594032,18228772272441, 782443669319410,37224994809379094, 1949799331997896119,111783178753323665728, 6978369826387194664144,472207139326449254997425] |