n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 22 |
4 | 150 |
5 | 1200 |
6 | 10922 |
7 | 110844 |
8 | 1236326 |
9 | 14990380 |
10 | 195895202 |
11 | 2740062260 |
12 | 40789039078 |
13 | 643118787708 |
14 | 10696195808162 |
15 | 186993601880756 |
16 | 3425688601198118 |
17 | 65586903427253532 |
18 | 1309155642001921026 |
19 | 27185548811026532692 |
20 | 586164185027289760806 |
[1,1,4,22,150,1200,10922,110844,1236326,14990380, 195895202,2740062260,40789039078,643118787708, 10696195808162,186993601880756,3425688601198118, 65586903427253532,1309155642001921026, 27185548811026532692,586164185027289760806] |