n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 27 |
6 | 108 |
7 | 475 |
8 | 2421 |
9 | 13859 |
10 | 88254 |
11 | 617957 |
12 | 4720980 |
13 | 39070669 |
14 | 348225424 |
15 | 3325303894 |
16 | 33871280413 |
17 | 366573108019 |
18 | 4200618576106 |
19 | 50809739256049 |
20 | 646929695900154 |
21 | 8648812936664311 |
22 | 121132117170628444 |
23 | 1773647319453218254 |
24 | 27099334868109293640 |
[1,1,1,3,9,27,108,475,2421,13859,88254,617957, 4720980,39070669,348225424,3325303894,33871280413, 366573108019,4200618576106,50809739256049, 646929695900154,8648812936664311, 121132117170628444,1773647319453218254, 27099334868109293640] |