n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 44 |
6 | 265 |
7 | 1854 |
8 | 14833 |
9 | 133498 |
10 | 1334981 |
11 | 14684790 |
12 | 176217481 |
13 | 2290827252 |
14 | 32071581529 |
15 | 481073722936 |
16 | 7697179566977 |
17 | 130852052638608 |
18 | 2355336947494945 |
19 | 44751402002403954 |
20 | 895028040048079081 |
[1,1,2,9,44,265,1854,14833,133498,1334981, 14684790,176217481,2290827252,32071581529, 481073722936,7697179566977,130852052638608, 2355336947494945,44751402002403954, 895028040048079081] |