n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 12 |
4 | 45 |
5 | 182 |
6 | 779 |
7 | 3480 |
8 | 16005 |
9 | 75234 |
10 | 359893 |
11 | 1746268 |
12 | 8573477 |
13 | 42511646 |
14 | 212587561 |
15 | 1070897000 |
16 | 5429174465 |
17 | 27679933778 |
18 | 141829437174 |
19 | 729972918876 |
20 | 3772160853821 |
21 | 19563615260102 |
22 | 101797930474515 |
23 | 531293155760840 |
24 | 2780515192595481 |
25 | 14588670579665882 |
[1,2,4,12,45,182,779,3480,16005,75234,359893, 1746268,8573477,42511646,212587561,1070897000, 5429174465,27679933778,141829437174,729972918876, 3772160853821,19563615260102,101797930474515, 531293155760840,2780515192595481, 14588670579665882] |