n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 19 |
4 | 56 |
5 | 160 |
6 | 462 |
7 | 1329 |
8 | 3828 |
9 | 11021 |
10 | 31735 |
11 | 91376 |
12 | 263108 |
13 | 757588 |
14 | 2181389 |
15 | 6281058 |
16 | 18085587 |
17 | 52075371 |
18 | 149945056 |
19 | 431749580 |
20 | 1243173370 |
21 | 3579575053 |
22 | 10306975580 |
23 | 29677753369 |
24 | 85453685055 |
25 | 246054079584 |
26 | 708484485384 |
[1,7,19,56,160,462,1329,3828,11021,31735,91376, 263108,757588,2181389,6281058,18085587,52075371, 149945056,431749580,1243173370,3579575053, 10306975580,29677753369,85453685055,246054079584, 708484485384] |