n | a(n) |
---|---|
1 | 2 |
2 | 5 |
3 | 15 |
4 | 61 |
5 | 308 |
6 | 1851 |
7 | 12959 |
8 | 103678 |
9 | 933103 |
10 | 9331039 |
11 | 102641438 |
12 | 1231697258 |
13 | 16012064360 |
14 | 224168901043 |
15 | 3362533515646 |
16 | 53800536250343 |
17 | 914609116255840 |
18 | 16462964092605136 |
19 | 312796317759497601 |
20 | 6255926355189952031 |
[2,5,15,61,308,1851,12959,103678,933103,9331039, 102641438,1231697258,16012064360,224168901043, 3362533515646,53800536250343,914609116255840, 16462964092605136,312796317759497601, 6255926355189952031] |