n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 29 |
5 | 91 |
6 | 282 |
7 | 864 |
8 | 2624 |
9 | 7905 |
10 | 23665 |
11 | 70458 |
12 | 208813 |
13 | 616400 |
14 | 1813354 |
15 | 5318673 |
16 | 15559072 |
17 | 45410239 |
18 | 132258752 |
19 | 384493609 |
20 | 1115907585 |
21 | 3233782193 |
22 | 9358293913 |
23 | 27048189854 |
24 | 78087437216 |
25 | 225198736949 |
26 | 648826102943 |
27 | 1867669679538 |
28 | 5371673739750 |
[0,1,3,9,29,91,282,864,2624,7905,23665,70458, 208813,616400,1813354,5318673,15559072,45410239, 132258752,384493609,1115907585,3233782193, 9358293913,27048189854,78087437216,225198736949, 648826102943,1867669679538,5371673739750] |