n | a(n) |
---|---|
1 | 3 |
2 | 6 |
3 | 18 |
4 | 41 |
5 | 123 |
6 | 310 |
7 | 957 |
8 | 2530 |
9 | 7848 |
10 | 21618 |
11 | 67131 |
12 | 188835 |
13 | 585276 |
14 | 1670602 |
15 | 5161503 |
16 | 14880389 |
17 | 45808419 |
18 | 133004125 |
19 | 408229851 |
20 | 1191329175 |
21 | 3646802121 |
22 | 10684589006 |
23 | 32632896159 |
24 | 95903053435 |
25 | 292350907470 |
26 | 861289976308 |
[3,6,18,41,123,310,957,2530,7848,21618,67131, 188835,585276,1670602,5161503,14880389,45808419, 133004125,408229851,1191329175,3646802121, 10684589006,32632896159,95903053435,292350907470, 861289976308] |