n | a(n) |
---|---|
0 | 18 |
1 | 58 |
2 | 178 |
3 | 538 |
4 | 1618 |
5 | 4858 |
6 | 14578 |
7 | 43738 |
8 | 131218 |
9 | 393658 |
10 | 1180978 |
11 | 3542938 |
12 | 10628818 |
13 | 31886458 |
14 | 95659378 |
15 | 286978138 |
16 | 860934418 |
17 | 2582803258 |
18 | 7748409778 |
19 | 23245229338 |
20 | 69735688018 |
21 | 209207064058 |
22 | 627621192178 |
23 | 1882863576538 |
[18,58,178,538,1618,4858,14578,43738,131218, 393658,1180978,3542938,10628818,31886458,95659378, 286978138,860934418,2582803258,7748409778, 23245229338,69735688018,209207064058,627621192178, 1882863576538] |