n | a(n) |
---|---|
1 | 3 |
2 | 6 |
3 | 12 |
4 | 24 |
5 | 54 |
6 | 138 |
7 | 378 |
8 | 1080 |
9 | 3186 |
10 | 9642 |
11 | 29784 |
12 | 93552 |
13 | 297966 |
14 | 960294 |
15 | 3126408 |
16 | 10268688 |
17 | 33989388 |
18 | 113277582 |
19 | 379833906 |
20 | 1280618784 |
21 | 4339003044 |
22 | 14767407522 |
23 | 50464951224 |
24 | 173099580168 |
25 | 595786322292 |
26 | 2057106617226 |
27 | 7123467773790 |
28 | 24734460619704 |
[3,6,12,24,54,138,378,1080,3186,9642,29784,93552, 297966,960294,3126408,10268688,33989388,113277582, 379833906,1280618784,4339003044,14767407522, 50464951224,173099580168,595786322292, 2057106617226,7123467773790,24734460619704] |