n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 21 |
3 | 91 |
4 | 371 |
5 | 1547 |
6 | 6405 |
7 | 26585 |
8 | 110254 |
9 | 457379 |
10 | 1897214 |
11 | 7869927 |
12 | 32645269 |
13 | 135416457 |
14 | 561722840 |
15 | 2330091144 |
16 | 9665485440 |
17 | 40093544735 |
18 | 166312629795 |
19 | 689883899612 |
20 | 2861717685450 |
21 | 11870733787751 |
22 | 49241167758705 |
23 | 204258021937291 |
24 | 847285745315256 |
[1,6,21,91,371,1547,6405,26585,110254,457379, 1897214,7869927,32645269,135416457,561722840, 2330091144,9665485440,40093544735,166312629795, 689883899612,2861717685450,11870733787751, 49241167758705,204258021937291,847285745315256] |