n | a(n) |
---|---|
0 | 3 |
1 | 9 |
2 | 27 |
3 | 69 |
4 | 171 |
5 | 405 |
6 | 939 |
7 | 2133 |
8 | 4779 |
9 | 10581 |
10 | 23211 |
11 | 50517 |
12 | 109227 |
13 | 234837 |
14 | 502443 |
15 | 1070421 |
16 | 2271915 |
17 | 4805973 |
18 | 10136235 |
19 | 21321045 |
20 | 44739243 |
21 | 93672789 |
22 | 195734187 |
23 | 408245589 |
24 | 850045611 |
25 | 1767200085 |
26 | 3668617899 |
27 | 7605671253 |
28 | 15748213419 |
29 | 32570168661 |
30 | 67287820971 |
[3,9,27,69,171,405,939,2133,4779,10581,23211, 50517,109227,234837,502443,1070421,2271915, 4805973,10136235,21321045,44739243,93672789, 195734187,408245589,850045611,1767200085, 3668617899,7605671253,15748213419,32570168661, 67287820971] |