n | a(n) |
---|---|
1 | 3 |
2 | 9 |
3 | 24 |
4 | 64 |
5 | 164 |
6 | 418 |
7 | 1048 |
8 | 2614 |
9 | 6468 |
10 | 15942 |
11 | 39120 |
12 | 95734 |
13 | 233660 |
14 | 569230 |
15 | 1384408 |
16 | 3362686 |
17 | 8158932 |
18 | 19778982 |
19 | 47913504 |
20 | 115999462 |
21 | 280698860 |
22 | 678970558 |
23 | 1641785704 |
24 | 3968834446 |
25 | 9592037508 |
26 | 23178077334 |
27 | 55998523824 |
28 | 135275792374 |
[3,9,24,64,164,418,1048,2614,6468,15942,39120, 95734,233660,569230,1384408,3362686,8158932, 19778982,47913504,115999462,280698860,678970558, 1641785704,3968834446,9592037508,23178077334, 55998523824,135275792374] |