n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 17 |
5 | 41 |
6 | 107 |
7 | 287 |
8 | 809 |
9 | 2341 |
10 | 6965 |
11 | 21101 |
12 | 65031 |
13 | 202939 |
14 | 640441 |
15 | 2039509 |
16 | 6546861 |
17 | 21158437 |
18 | 68791923 |
19 | 224839127 |
20 | 738316629 |
21 | 2434622357 |
22 | 8058616301 |
23 | 26765349429 |
24 | 89173526191 |
25 | 297942766331 |
26 | 998072479961 |
27 | 3351459203873 |
[0,1,3,7,17,41,107,287,809,2341,6965,21101,65031, 202939,640441,2039509,6546861,21158437,68791923, 224839127,738316629,2434622357,8058616301, 26765349429,89173526191,297942766331,998072479961, 3351459203873] |