n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 29 |
4 | 108 |
5 | 393 |
6 | 1298 |
7 | 4271 |
8 | 13312 |
9 | 41469 |
10 | 125042 |
11 | 376747 |
12 | 1111144 |
13 | 3274475 |
14 | 9505054 |
15 | 27573041 |
16 | 79086964 |
17 | 226727667 |
18 | 644301026 |
19 | 1830188555 |
20 | 5162408200 |
21 | 14556754485 |
22 | 40811281170 |
[1,6,29,108,393,1298,4271,13312,41469,125042, 376747,1111144,3274475,9505054,27573041,79086964, 226727667,644301026,1830188555,5162408200, 14556754485,40811281170] |