n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 25 |
4 | 145 |
5 | 905 |
6 | 5941 |
7 | 40433 |
8 | 282721 |
9 | 2018897 |
10 | 14661349 |
11 | 107945993 |
12 | 803922289 |
13 | 6045458905 |
14 | 45840518933 |
15 | 350100674785 |
16 | 2690717983169 |
17 | 20794719218593 |
18 | 161502488175557 |
19 | 1259855507859193 |
20 | 9867012143508305 |
21 | 77554946281194793 |
22 | 611575725258403061 |
[1,1,5,25,145,905,5941,40433,282721,2018897, 14661349,107945993,803922289,6045458905, 45840518933,350100674785,2690717983169, 20794719218593,161502488175557,1259855507859193, 9867012143508305,77554946281194793, 611575725258403061] |