n | a(n) |
---|---|
1 | 3 |
2 | 12 |
3 | 65 |
4 | 403 |
5 | 2652 |
6 | 17889 |
7 | 121859 |
8 | 833260 |
9 | 5706081 |
10 | 39096531 |
11 | 267936188 |
12 | 1836369217 |
13 | 12586419075 |
14 | 86267964108 |
15 | 591287758337 |
16 | 4052742230419 |
17 | 27777897084444 |
18 | 190392509164065 |
19 | 1304969593244291 |
20 | 8944394450283436 |
[3,12,65,403,2652,17889,121859,833260,5706081, 39096531,267936188,1836369217,12586419075, 86267964108,591287758337,4052742230419, 27777897084444,190392509164065,1304969593244291, 8944394450283436] |