n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 21 |
4 | 54 |
5 | 137 |
6 | 344 |
7 | 857 |
8 | 2122 |
9 | 5229 |
10 | 12836 |
11 | 31413 |
12 | 76686 |
13 | 186833 |
14 | 454448 |
15 | 1103921 |
16 | 2678674 |
17 | 6494037 |
18 | 15732284 |
19 | 38089677 |
20 | 92173782 |
21 | 222961529 |
22 | 539145416 |
23 | 1303349513 |
24 | 3150038746 |
25 | 7611815613 |
26 | 18390447188 |
27 | 44426264421 |
28 | 107310084894 |
[1,3,8,21,54,137,344,857,2122,5229,12836,31413, 76686,186833,454448,1103921,2678674,6494037, 15732284,38089677,92173782,222961529,539145416, 1303349513,3150038746,7611815613,18390447188, 44426264421,107310084894] |