n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 53 |
4 | 341 |
5 | 2169 |
6 | 13825 |
7 | 88093 |
8 | 561357 |
9 | 3577121 |
10 | 22794425 |
11 | 145252485 |
12 | 925589701 |
13 | 5898117961 |
14 | 37584466929 |
15 | 239498796653 |
16 | 1526153708861 |
17 | 9725080775409 |
18 | 61970950592425 |
19 | 394896331045333 |
20 | 2516390514947637 |
[1,9,53,341,2169,13825,88093,561357,3577121, 22794425,145252485,925589701,5898117961, 37584466929,239498796653,1526153708861, 9725080775409,61970950592425,394896331045333, 2516390514947637] |