n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 94 |
6 | 450 |
7 | 2366 |
8 | 13450 |
9 | 81802 |
10 | 527826 |
11 | 3590294 |
12 | 25609782 |
13 | 190753502 |
14 | 1478339866 |
15 | 11884997478 |
16 | 98859026322 |
17 | 848881803218 |
18 | 7509881820930 |
19 | 68330806392070 |
20 | 638444805545622 |
21 | 6117166765086366 |
22 | 60028033370994386 |
[1,1,2,6,22,94,450,2366,13450,81802,527826, 3590294,25609782,190753502,1478339866,11884997478, 98859026322,848881803218,7509881820930, 68330806392070,638444805545622,6117166765086366, 60028033370994386] |