n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 16 |
5 | 85 |
6 | 516 |
7 | 1519 |
8 | 6280 |
9 | 45441 |
10 | 1036540 |
11 | 3057571 |
12 | 19015404 |
13 | 113149777 |
14 | 1303782858 |
15 | 58924767945 |
16 | 201133190416 |
17 | 1373883085105 |
18 | 9025607302524 |
19 | 77866915459771 |
20 | 1150905029014900 |
21 | 93546293477336721 |
[1,1,2,9,16,85,516,1519,6280,45441,1036540, 3057571,19015404,113149777,1303782858,58924767945, 201133190416,1373883085105,9025607302524, 77866915459771,1150905029014900,93546293477336721] |