n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 53 |
7 | 215 |
8 | 976 |
9 | 4859 |
10 | 26150 |
11 | 150585 |
12 | 920910 |
13 | 5946929 |
14 | 40369352 |
15 | 287020631 |
16 | 2130932767 |
17 | 16478548793 |
18 | 132438164617 |
19 | 1104141400679 |
20 | 9532801486793 |
21 | 85102769453094 |
22 | 784511536839904 |
23 | 7458380835336557 |
[1,1,2,5,15,53,215,976,4859,26150,150585,920910, 5946929,40369352,287020631,2130932767,16478548793, 132438164617,1104141400679,9532801486793, 85102769453094,784511536839904,7458380835336557] |