n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 26 |
4 | 137 |
5 | 726 |
6 | 3858 |
7 | 20532 |
8 | 109361 |
9 | 582782 |
10 | 3106550 |
11 | 16562668 |
12 | 88314634 |
13 | 470942044 |
14 | 2511443268 |
15 | 13393472616 |
16 | 71428622337 |
17 | 380940866574 |
18 | 2031641406798 |
19 | 10835261623356 |
20 | 57787472903502 |
21 | 308197667445204 |
22 | 1643712737618748 |
23 | 8766437439778776 |
24 | 46754218658948922 |
[1,1,5,26,137,726,3858,20532,109361,582782, 3106550,16562668,88314634,470942044,2511443268, 13393472616,71428622337,380940866574, 2031641406798,10835261623356,57787472903502, 308197667445204,1643712737618748,8766437439778776, 46754218658948922] |