n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 24 |
4 | 72 |
5 | 174 |
6 | 519 |
7 | 1284 |
8 | 3813 |
9 | 9300 |
10 | 27462 |
11 | 66666 |
12 | 195674 |
13 | 470886 |
14 | 1372946 |
15 | 3280224 |
16 | 9495005 |
17 | 22487511 |
18 | 64615934 |
19 | 151714911 |
[1,3,9,24,72,174,519,1284,3813,9300,27462,66666, 195674,470886,1372946,3280224,9495005,22487511, 64615934,151714911] |