n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 3 |
4 | 9 |
5 | 30 |
6 | 81 |
7 | 225 |
8 | 756 |
9 | 2187 |
10 | 6561 |
11 | 19602 |
12 | 59049 |
13 | 177633 |
14 | 530712 |
15 | 1594323 |
16 | 4782969 |
17 | 14351094 |
18 | 43046721 |
19 | 129127041 |
20 | 387440172 |
21 | 1162261467 |
[1,0,3,9,30,81,225,756,2187,6561,19602,59049, 177633,530712,1594323,4782969,14351094,43046721, 129127041,387440172,1162261467] |