n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 22 |
5 | 63 |
6 | 191 |
7 | 573 |
8 | 1752 |
9 | 5372 |
10 | 16597 |
11 | 51465 |
12 | 160258 |
13 | 500551 |
14 | 1567881 |
15 | 4922687 |
16 | 15488481 |
17 | 48821964 |
18 | 154147654 |
19 | 487412324 |
20 | 1543231353 |
21 | 4891986889 |
22 | 15524303265 |
23 | 49314008259 |
24 | 156791992914 |
25 | 498931763064 |
26 | 1588891019625 |
[1,1,3,7,22,63,191,573,1752,5372,16597,51465, 160258,500551,1567881,4922687,15488481,48821964, 154147654,487412324,1543231353,4891986889, 15524303265,49314008259,156791992914,498931763064, 1588891019625] |