n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 13 |
5 | 41 |
6 | 133 |
7 | 457 |
8 | 1626 |
9 | 5983 |
10 | 22581 |
11 | 86273 |
12 | 332309 |
13 | 1289466 |
14 | 5037491 |
15 | 19814253 |
16 | 78464829 |
17 | 312698663 |
18 | 1253236364 |
19 | 5047142834 |
20 | 20408861265 |
21 | 82804575274 |
22 | 336913925731 |
23 | 1374181645807 |
24 | 5617148927835 |
25 | 23007022273962 |
[1,2,4,13,41,133,457,1626,5983,22581,86273,332309, 1289466,5037491,19814253,78464829,312698663, 1253236364,5047142834,20408861265,82804575274, 336913925731,1374181645807,5617148927835, 23007022273962] |