n | a(n) |
---|---|
0 | 3 |
1 | 12 |
2 | 42 |
3 | 123 |
4 | 366 |
5 | 1092 |
6 | 3279 |
7 | 9840 |
8 | 29526 |
9 | 88575 |
10 | 265722 |
11 | 797160 |
12 | 2391483 |
13 | 7174452 |
14 | 21523362 |
15 | 64570083 |
16 | 193710246 |
17 | 581130732 |
18 | 1743392199 |
19 | 5230176600 |
20 | 15690529806 |
21 | 47071589415 |
22 | 141214768242 |
23 | 423644304720 |
24 | 1270932914163 |
[3,12,42,123,366,1092,3279,9840,29526,88575, 265722,797160,2391483,7174452,21523362,64570083, 193710246,581130732,1743392199,5230176600, 15690529806,47071589415,141214768242,423644304720, 1270932914163] |