n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 70 |
5 | 431 |
6 | 2904 |
7 | 20884 |
8 | 157881 |
9 | 1242470 |
10 | 10111281 |
11 | 84700640 |
12 | 727952319 |
13 | 6403738619 |
14 | 57563742289 |
15 | 528125896942 |
16 | 4941448428666 |
17 | 47128664659641 |
18 | 458055597979709 |
19 | 4536505547203889 |
20 | 45785021320327540 |
21 | 470972703324515813 |
[1,1,3,13,70,431,2904,20884,157881,1242470, 10111281,84700640,727952319,6403738619, 57563742289,528125896942,4941448428666, 47128664659641,458055597979709,4536505547203889, 45785021320327540,470972703324515813] |