n | a(n) |
---|---|
1 | 3 |
2 | 30 |
3 | 198 |
4 | 1326 |
5 | 8886 |
6 | 59550 |
7 | 399078 |
8 | 2674446 |
9 | 17922966 |
10 | 120111870 |
11 | 804937158 |
12 | 5394336366 |
13 | 36150480246 |
14 | 242264688990 |
15 | 1623551862438 |
16 | 10880333659086 |
17 | 72915231888726 |
18 | 488645955902910 |
19 | 3274691227542918 |
20 | 21945546680994606 |
21 | 147069444311876406 |
22 | 985595016821145630 |
[3,30,198,1326,8886,59550,399078,2674446,17922966, 120111870,804937158,5394336366,36150480246, 242264688990,1623551862438,10880333659086, 72915231888726,488645955902910,3274691227542918, 21945546680994606,147069444311876406, 985595016821145630] |