n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 17 |
4 | 49 |
5 | 166 |
6 | 573 |
7 | 1933 |
8 | 6538 |
9 | 22165 |
10 | 75089 |
11 | 254350 |
12 | 861661 |
13 | 2919029 |
14 | 9888610 |
15 | 33499125 |
16 | 113483321 |
17 | 384441606 |
18 | 1302353053 |
19 | 4411914717 |
20 | 14946017274 |
21 | 50631856149 |
22 | 171522942625 |
23 | 581059476926 |
24 | 1968425392285 |
25 | 6668333757637 |
[1,4,17,49,166,573,1933,6538,22165,75089,254350, 861661,2919029,9888610,33499125,113483321, 384441606,1302353053,4411914717,14946017274, 50631856149,171522942625,581059476926, 1968425392285,6668333757637] |