n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 27 |
4 | 78 |
5 | 225 |
6 | 648 |
7 | 1863 |
8 | 5355 |
9 | 15390 |
10 | 44226 |
11 | 127089 |
12 | 365202 |
13 | 1049436 |
14 | 3015630 |
15 | 8665623 |
16 | 24901263 |
17 | 71555481 |
18 | 205619553 |
19 | 590861790 |
20 | 1697881581 |
21 | 4878978300 |
22 | 14020076241 |
23 | 40287643353 |
24 | 115769285316 |
25 | 332670921048 |
[1,3,9,27,78,225,648,1863,5355,15390,44226,127089, 365202,1049436,3015630,8665623,24901263,71555481, 205619553,590861790,1697881581,4878978300, 14020076241,40287643353,115769285316,332670921048] |