n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 24 |
6 | 95 |
7 | 388 |
8 | 1650 |
9 | 7183 |
10 | 31965 |
11 | 144502 |
12 | 662241 |
13 | 3068942 |
14 | 14358678 |
15 | 67729973 |
16 | 321759461 |
17 | 1538076291 |
18 | 7392775328 |
19 | 35707198905 |
20 | 173221206284 |
21 | 843634142771 |
22 | 4123376617009 |
23 | 20218897206392 |
24 | 99436453714990 |
25 | 490355165178472 |
26 | 2424146632435852 |
[1,1,2,7,24,95,388,1650,7183,31965,144502,662241, 3068942,14358678,67729973,321759461,1538076291, 7392775328,35707198905,173221206284,843634142771, 4123376617009,20218897206392,99436453714990, 490355165178472,2424146632435852] |