n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 70 |
5 | 755 |
6 | 10166 |
7 | 161350 |
8 | 2917524 |
9 | 58811631 |
10 | 1302452122 |
11 | 31362843270 |
12 | 814897356483 |
13 | 22712570157056 |
14 | 675859219349848 |
15 | 21387996239065027 |
16 | 717377276724961024 |
17 | 25427514619872897327 |
18 | 949918395837579798600 |
[1,1,2,9,70,755,10166,161350,2917524,58811631, 1302452122,31362843270,814897356483, 22712570157056,675859219349848,21387996239065027, 717377276724961024,25427514619872897327, 949918395837579798600] |