n | a(n) |
---|---|
1 | 15 |
2 | 21 |
3 | 345 |
4 | 2391 |
5 | 19307 |
6 | 131724 |
7 | 854611 |
8 | 5244065 |
9 | 31109196 |
10 | 177926081 |
11 | 979705264 |
12 | 5192348891 |
13 | 26557163019 |
14 | 131502649555 |
15 | 632166025952 |
16 | 2956537440503 |
17 | 13474531366615 |
18 | 59932391653310 |
19 | 260511358279859 |
20 | 1108055431000178 |
[15,21,345,2391,19307,131724,854611,5244065, 31109196,177926081,979705264,5192348891, 26557163019,131502649555,632166025952, 2956537440503,13474531366615,59932391653310, 260511358279859,1108055431000178] |