n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 27 |
5 | 85 |
6 | 283 |
7 | 985 |
8 | 3539 |
9 | 13013 |
10 | 48707 |
11 | 184921 |
12 | 710347 |
13 | 2755669 |
14 | 10780139 |
15 | 42477977 |
16 | 168439619 |
17 | 671641685 |
18 | 2691362195 |
19 | 10832277401 |
20 | 43771088315 |
21 | 177504638933 |
22 | 722178443963 |
23 | 2946919157081 |
24 | 12057932335283 |
25 | 49461067106261 |
26 | 203355663470307 |
27 | 837870162610137 |
[1,1,3,9,27,85,283,985,3539,13013,48707,184921, 710347,2755669,10780139,42477977,168439619, 671641685,2691362195,10832277401,43771088315, 177504638933,722178443963,2946919157081, 12057932335283,49461067106261,203355663470307, 837870162610137] |