n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 17 |
5 | 142 |
6 | 1558 |
7 | 21155 |
8 | 342584 |
9 | 6448217 |
10 | 138392304 |
11 | 3336869488 |
12 | 89325958048 |
13 | 2629214627421 |
14 | 84408934941424 |
15 | 2935694381925743 |
16 | 109967573757472768 |
17 | 4414292541216287516 |
18 | 189054708982869449056 |
[1,1,3,17,142,1558,21155,342584,6448217,138392304, 3336869488,89325958048,2629214627421, 84408934941424,2935694381925743, 109967573757472768,4414292541216287516, 189054708982869449056] |