n | a(n) |
---|---|
1 | 2 |
2 | 13 |
3 | 81 |
4 | 486 |
5 | 2918 |
6 | 17509 |
7 | 105057 |
8 | 630342 |
9 | 3782054 |
10 | 22692325 |
11 | 136153953 |
12 | 816923718 |
13 | 4901542310 |
14 | 29409253861 |
15 | 176455523169 |
16 | 1058733139014 |
17 | 6352398834086 |
18 | 38114393004517 |
19 | 228686358027105 |
20 | 1372118148162630 |
[2,13,81,486,2918,17509,105057,630342,3782054, 22692325,136153953,816923718,4901542310, 29409253861,176455523169,1058733139014, 6352398834086,38114393004517,228686358027105, 1372118148162630] |