n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 19 |
5 | 51 |
6 | 143 |
7 | 407 |
8 | 1179 |
9 | 3451 |
10 | 10183 |
11 | 30207 |
12 | 89939 |
13 | 268451 |
14 | 802623 |
15 | 2402407 |
16 | 7196299 |
17 | 21567051 |
18 | 64657463 |
19 | 193885007 |
20 | 581480259 |
21 | 1744091251 |
22 | 5231574703 |
23 | 15693326007 |
24 | 47077181819 |
25 | 141225953051 |
26 | 423666674343 |
[1,1,3,7,19,51,143,407,1179,3451,10183,30207, 89939,268451,802623,2402407,7196299,21567051, 64657463,193885007,581480259,1744091251, 5231574703,15693326007,47077181819,141225953051, 423666674343] |