n | a(n) |
---|---|
1 | 3 |
2 | 8 |
3 | 20 |
4 | 50 |
5 | 122 |
6 | 290 |
7 | 674 |
8 | 1538 |
9 | 3462 |
10 | 7720 |
11 | 17104 |
12 | 37708 |
13 | 82768 |
14 | 180880 |
15 | 393488 |
16 | 851914 |
17 | 1835470 |
18 | 3935808 |
19 | 8402158 |
20 | 17865738 |
21 | 37858268 |
22 | 79991512 |
23 | 168605710 |
24 | 354649382 |
25 | 744605426 |
26 | 1560666296 |
27 | 3265699888 |
28 | 6822355756 |
29 | 14229565634 |
[3,8,20,50,122,290,674,1538,3462,7720,17104,37708, 82768,180880,393488,851914,1835470,3935808, 8402158,17865738,37858268,79991512,168605710, 354649382,744605426,1560666296,3265699888, 6822355756,14229565634] |