n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 94 |
4 | 657 |
5 | 4902 |
6 | 38236 |
7 | 308025 |
8 | 2542965 |
9 | 21401780 |
10 | 182934144 |
11 | 1583745114 |
12 | 13858675065 |
13 | 122379042879 |
14 | 1089156646584 |
15 | 9759520978270 |
16 | 87975115569873 |
17 | 797233088237190 |
18 | 7258632128721117 |
19 | 66367727370376632 |
20 | 609132332475784548 |
21 | 5610015849998778144 |
[1,3,15,94,657,4902,38236,308025,2542965,21401780, 182934144,1583745114,13858675065,122379042879, 1089156646584,9759520978270,87975115569873, 797233088237190,7258632128721117, 66367727370376632,609132332475784548, 5610015849998778144] |