n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 9 |
3 | 21 |
4 | 49 |
5 | 113 |
6 | 257 |
7 | 577 |
8 | 1281 |
9 | 2817 |
10 | 6145 |
11 | 13313 |
12 | 28673 |
13 | 61441 |
14 | 131073 |
15 | 278529 |
16 | 589825 |
17 | 1245185 |
18 | 2621441 |
19 | 5505025 |
20 | 11534337 |
21 | 24117249 |
22 | 50331649 |
23 | 104857601 |
24 | 218103809 |
25 | 452984833 |
26 | 939524097 |
27 | 1946157057 |
28 | 4026531841 |
[1,4,9,21,49,113,257,577,1281,2817,6145,13313, 28673,61441,131073,278529,589825,1245185,2621441, 5505025,11534337,24117249,50331649,104857601, 218103809,452984833,939524097,1946157057, 4026531841] |