n | a(n) |
---|---|
0 | 3 |
1 | 8 |
2 | 21 |
3 | 55 |
4 | 145 |
5 | 381 |
6 | 1001 |
7 | 2633 |
8 | 6921 |
9 | 18193 |
10 | 47833 |
11 | 125745 |
12 | 330569 |
13 | 869057 |
14 | 2284665 |
15 | 6006193 |
16 | 15789865 |
17 | 41510241 |
18 | 109127129 |
19 | 286886801 |
[3,8,21,55,145,381,1001,2633,6921,18193,47833, 125745,330569,869057,2284665,6006193,15789865, 41510241,109127129,286886801] |