n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 17 |
4 | 76 |
5 | 352 |
6 | 1674 |
7 | 8129 |
8 | 40156 |
9 | 201236 |
10 | 1020922 |
11 | 5234660 |
12 | 27089726 |
13 | 141335846 |
14 | 742712598 |
15 | 3927908193 |
16 | 20891799036 |
17 | 111688381228 |
18 | 599841215226 |
19 | 3234957053984 |
20 | 17512055200470 |
21 | 95125188934942 |
22 | 518340392855286 |
23 | 2832580291316092 |
24 | 15520177744727766 |
[1,4,17,76,352,1674,8129,40156,201236,1020922, 5234660,27089726,141335846,742712598,3927908193, 20891799036,111688381228,599841215226, 3234957053984,17512055200470,95125188934942, 518340392855286,2832580291316092, 15520177744727766] |