n | a(n) |
---|---|
6 | 3 |
7 | 26 |
8 | 198 |
9 | 1095 |
10 | 5259 |
11 | 22678 |
12 | 91887 |
13 | 354442 |
14 | 1320089 |
15 | 4780355 |
16 | 16943165 |
17 | 59007970 |
18 | 202599228 |
19 | 687342673 |
20 | 2308586154 |
21 | 7687335917 |
22 | 25407923029 |
23 | 83430814454 |
24 | 272382655862 |
25 | 884706011664 |
26 | 2860304423466 |
27 | 9208948000393 |
[3,26,198,1095,5259,22678,91887,354442,1320089, 4780355,16943165,59007970,202599228,687342673, 2308586154,7687335917,25407923029,83430814454, 272382655862,884706011664,2860304423466, 9208948000393] |