n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 25 |
5 | 137 |
6 | 944 |
7 | 7884 |
8 | 77514 |
9 | 877002 |
10 | 11218428 |
11 | 160010244 |
12 | 2516742498 |
13 | 43260962754 |
14 | 806650405800 |
15 | 16213824084864 |
16 | 349441656710217 |
17 | 8037981040874313 |
18 | 196539809431339642 |
19 | 5090276002949080318 |
20 | 139202688233361310841 |
21 | 4008133046329085884137 |
[1,1,2,6,25,137,944,7884,77514,877002,11218428, 160010244,2516742498,43260962754,806650405800, 16213824084864,349441656710217,8037981040874313, 196539809431339642,5090276002949080318, 139202688233361310841,4008133046329085884137] |