n | a(n) |
---|---|
1 | 3 |
2 | 12 |
3 | 81 |
4 | 474 |
5 | 2678 |
6 | 15410 |
7 | 88767 |
8 | 510482 |
9 | 2936714 |
10 | 16895217 |
11 | 97197637 |
12 | 559175541 |
13 | 3216923150 |
14 | 18506887013 |
15 | 106469709385 |
16 | 612517802024 |
17 | 3523801014059 |
18 | 20272347435052 |
19 | 116626354899557 |
20 | 670948774602366 |
21 | 3859953085161367 |
[3,12,81,474,2678,15410,88767,510482,2936714, 16895217,97197637,559175541,3216923150, 18506887013,106469709385,612517802024, 3523801014059,20272347435052,116626354899557, 670948774602366,3859953085161367] |