n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 49 |
5 | 250 |
6 | 1501 |
7 | 10514 |
8 | 84113 |
9 | 757026 |
10 | 7570261 |
11 | 83272882 |
12 | 999274585 |
13 | 12990569618 |
14 | 181867974653 |
15 | 2728019619810 |
16 | 43648313916961 |
17 | 742021336588354 |
18 | 13356384058590373 |
19 | 253771297113217106 |
20 | 5075425942264342121 |
21 | 106583944787551184562 |
22 | 2344846785326126060365 |
[0,1,3,12,49,250,1501,10514,84113,757026,7570261, 83272882,999274585,12990569618,181867974653, 2728019619810,43648313916961,742021336588354, 13356384058590373,253771297113217106, 5075425942264342121,106583944787551184562, 2344846785326126060365] |