n | a(n) |
---|---|
1 | 3 |
2 | 15 |
3 | 87 |
4 | 507 |
5 | 2955 |
6 | 17223 |
7 | 100383 |
8 | 585075 |
9 | 3410067 |
10 | 19875327 |
11 | 115841895 |
12 | 675176043 |
13 | 3935214363 |
14 | 22936110135 |
15 | 133681446447 |
16 | 779152568547 |
17 | 4541233964835 |
18 | 26468251220463 |
19 | 154268273357943 |
20 | 899141388927195 |
[3,15,87,507,2955,17223,100383,585075,3410067, 19875327,115841895,675176043,3935214363, 22936110135,133681446447,779152568547, 4541233964835,26468251220463,154268273357943, 899141388927195] |